Refactor for more flexibility

* Move from gcfg to toml configuration because gcfg was too restrictive
* Implemented gateway which has support multiple in and out bridges.
* Allow for bridging the same bridges, which means eg you can now bridge between multiple mattermosts.
* Support multiple gateways

16 files changed, 0 insertions, 1860 deletions

diff --git a/vendor/gopkg.in/gcfg.v1/LICENSE b/vendor/gopkg.in/gcfg.v1/LICENSE
deleted file mode 100644
index 87a5cede..00000000
--- a/vendor/gopkg.in/gcfg.v1/LICENSE
+++ /dev/null
@@ -1,28 +0,0 @@
-Copyright (c) 2012 Péter Surányi. Portions Copyright (c) 2009 The Go
-Authors. All rights reserved.
-
-Redistribution and use in source and binary forms, with or without
-modification, are permitted provided that the following conditions are
-met:
-
-   * Redistributions of source code must retain the above copyright
-notice, this list of conditions and the following disclaimer.
-   * Redistributions in binary form must reproduce the above
-copyright notice, this list of conditions and the following disclaimer
-in the documentation and/or other materials provided with the
-distribution.
-   * Neither the name of Google Inc. nor the names of its
-contributors may be used to endorse or promote products derived from
-this software without specific prior written permission.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/vendor/gopkg.in/gcfg.v1/doc.go b/vendor/gopkg.in/gcfg.v1/doc.go
deleted file mode 100644
index 0e198e36..00000000
--- a/vendor/gopkg.in/gcfg.v1/doc.go
+++ /dev/null
@@ -1,118 +0,0 @@
-// Package gcfg reads "INI-style" text-based configuration files with
-// "name=value" pairs grouped into sections (gcfg files).
-//
-// This package is still a work in progress; see the sections below for planned
-// changes.
-//
-// Syntax
-//
-// The syntax is based on that used by git config:
-// http://git-scm.com/docs/git-config#_syntax .
-// There are some (planned) differences compared to the git config format:
-//  - improve data portability:
-//    - must be encoded in UTF-8 (for now) and must not contain the 0 byte
-//    - include and "path" type is not supported
-//      (path type may be implementable as a user-defined type)
-//  - internationalization
-//    - section and variable names can contain unicode letters, unicode digits
-//      (as defined in http://golang.org/ref/spec#Characters ) and hyphens
-//      (U+002D), starting with a unicode letter
-//  - disallow potentially ambiguous or misleading definitions:
-//    - `[sec.sub]` format is not allowed (deprecated in gitconfig)
-//    - `[sec ""]` is not allowed
-//      - use `[sec]` for section name "sec" and empty subsection name
-//    - (planned) within a single file, definitions must be contiguous for each:
-//      - section: '[secA]' -> '[secB]' -> '[secA]' is an error
-//      - subsection: '[sec "A"]' -> '[sec "B"]' -> '[sec "A"]' is an error
-//      - multivalued variable: 'multi=a' -> 'other=x' -> 'multi=b' is an error
-//
-// Data structure
-//
-// The functions in this package read values into a user-defined struct.
-// Each section corresponds to a struct field in the config struct, and each
-// variable in a section corresponds to a data field in the section struct.
-// The mapping of each section or variable name to fields is done either based
-// on the "gcfg" struct tag or by matching the name of the section or variable,
-// ignoring case. In the latter case, hyphens '-' in section and variable names
-// correspond to underscores '_' in field names.
-// Fields must be exported; to use a section or variable name starting with a
-// letter that is neither upper- or lower-case, prefix the field name with 'X'.
-// (See https://code.google.com/p/go/issues/detail?id=5763#c4 .)
-//
-// For sections with subsections, the corresponding field in config must be a
-// map, rather than a struct, with string keys and pointer-to-struct values.
-// Values for subsection variables are stored in the map with the subsection
-// name used as the map key.
-// (Note that unlike section and variable names, subsection names are case
-// sensitive.)
-// When using a map, and there is a section with the same section name but
-// without a subsection name, its values are stored with the empty string used
-// as the key.
-//
-// The functions in this package panic if config is not a pointer to a struct,
-// or when a field is not of a suitable type (either a struct or a map with
-// string keys and pointer-to-struct values).
-//
-// Parsing of values
-//
-// The section structs in the config struct may contain single-valued or
-// multi-valued variables. Variables of unnamed slice type (that is, a type
-// starting with `[]`) are treated as multi-value; all others (including named
-// slice types) are treated as single-valued variables.
-//
-// Single-valued variables are handled based on the type as follows.
-// Unnamed pointer types (that is, types starting with `*`) are dereferenced,
-// and if necessary, a new instance is allocated.
-//
-// For types implementing the encoding.TextUnmarshaler interface, the
-// UnmarshalText method is used to set the value. Implementing this method is
-// the recommended way for parsing user-defined types.
-//
-// For fields of string kind, the value string is assigned to the field, after
-// unquoting and unescaping as needed.
-// For fields of bool kind, the field is set to true if the value is "true",
-// "yes", "on" or "1", and set to false if the value is "false", "no", "off" or
-// "0", ignoring case. In addition, single-valued bool fields can be specified
-// with a "blank" value (variable name without equals sign and value); in such
-// case the value is set to true.
-//
-// Predefined integer types [u]int(|8|16|32|64) and big.Int are parsed as
-// decimal or hexadecimal (if having '0x' prefix). (This is to prevent
-// unintuitively handling zero-padded numbers as octal.) Other types having
-// [u]int* as the underlying type, such as os.FileMode and uintptr allow
-// decimal, hexadecimal, or octal values.
-// Parsing mode for integer types can be overridden using the struct tag option
-// ",int=mode" where mode is a combination of the 'd', 'h', and 'o' characters
-// (each standing for decimal, hexadecimal, and octal, respectively.)
-//
-// All other types are parsed using fmt.Sscanf with the "%v" verb.
-//
-// For multi-valued variables, each individual value is parsed as above and
-// appended to the slice. If the first value is specified as a "blank" value
-// (variable name without equals sign and value), a new slice is allocated;
-// that is any values previously set in the slice will be ignored.
-//
-// The types subpackage for provides helpers for parsing "enum-like" and integer
-// types.
-//
-// TODO
-//
-// The following is a list of changes under consideration:
-//  - documentation
-//    - self-contained syntax documentation
-//    - more practical examples
-//    - move TODOs to issue tracker (eventually)
-//  - syntax
-//    - reconsider valid escape sequences
-//      (gitconfig doesn't support \r in value, \t in subsection name, etc.)
-//  - reading / parsing gcfg files
-//    - define internal representation structure
-//    - support multiple inputs (readers, strings, files)
-//    - support declaring encoding (?)
-//    - support varying fields sets for subsections (?)
-//  - writing gcfg files
-//  - error handling
-//    - make error context accessible programmatically?
-//    - limit input size?
-//
-package gcfg // import "gopkg.in/gcfg.v1"
diff --git a/vendor/gopkg.in/gcfg.v1/go1_0.go b/vendor/gopkg.in/gcfg.v1/go1_0.go
deleted file mode 100644
index 66702107..00000000
--- a/vendor/gopkg.in/gcfg.v1/go1_0.go
+++ /dev/null
@@ -1,7 +0,0 @@
-// +build !go1.2
-
-package gcfg
-
-type textUnmarshaler interface {
-	UnmarshalText(text []byte) error
-}
diff --git a/vendor/gopkg.in/gcfg.v1/go1_2.go b/vendor/gopkg.in/gcfg.v1/go1_2.go
deleted file mode 100644
index 6f5843bc..00000000
--- a/vendor/gopkg.in/gcfg.v1/go1_2.go
+++ /dev/null
@@ -1,9 +0,0 @@
-// +build go1.2
-
-package gcfg
-
-import (
-	"encoding"
-)
-
-type textUnmarshaler encoding.TextUnmarshaler
diff --git a/vendor/gopkg.in/gcfg.v1/read.go b/vendor/gopkg.in/gcfg.v1/read.go
deleted file mode 100644
index fdfb5f3a..00000000
--- a/vendor/gopkg.in/gcfg.v1/read.go
+++ /dev/null
@@ -1,188 +0,0 @@
-package gcfg
-
-import (
-	"fmt"
-	"io"
-	"io/ioutil"
-	"os"
-	"strings"
-)
-
-import (
-	"gopkg.in/gcfg.v1/scanner"
-	"gopkg.in/gcfg.v1/token"
-)
-
-var unescape = map[rune]rune{'\\': '\\', '"': '"', 'n': '\n', 't': '\t'}
-
-// no error: invalid literals should be caught by scanner
-func unquote(s string) string {
-	u, q, esc := make([]rune, 0, len(s)), false, false
-	for _, c := range s {
-		if esc {
-			uc, ok := unescape[c]
-			switch {
-			case ok:
-				u = append(u, uc)
-				fallthrough
-			case !q && c == '\n':
-				esc = false
-				continue
-			}
-			panic("invalid escape sequence")
-		}
-		switch c {
-		case '"':
-			q = !q
-		case '\\':
-			esc = true
-		default:
-			u = append(u, c)
-		}
-	}
-	if q {
-		panic("missing end quote")
-	}
-	if esc {
-		panic("invalid escape sequence")
-	}
-	return string(u)
-}
-
-func readInto(config interface{}, fset *token.FileSet, file *token.File, src []byte) error {
-	var s scanner.Scanner
-	var errs scanner.ErrorList
-	s.Init(file, src, func(p token.Position, m string) { errs.Add(p, m) }, 0)
-	sect, sectsub := "", ""
-	pos, tok, lit := s.Scan()
-	errfn := func(msg string) error {
-		return fmt.Errorf("%s: %s", fset.Position(pos), msg)
-	}
-	for {
-		if errs.Len() > 0 {
-			return errs.Err()
-		}
-		switch tok {
-		case token.EOF:
-			return nil
-		case token.EOL, token.COMMENT:
-			pos, tok, lit = s.Scan()
-		case token.LBRACK:
-			pos, tok, lit = s.Scan()
-			if errs.Len() > 0 {
-				return errs.Err()
-			}
-			if tok != token.IDENT {
-				return errfn("expected section name")
-			}
-			sect, sectsub = lit, ""
-			pos, tok, lit = s.Scan()
-			if errs.Len() > 0 {
-				return errs.Err()
-			}
-			if tok == token.STRING {
-				sectsub = unquote(lit)
-				if sectsub == "" {
-					return errfn("empty subsection name")
-				}
-				pos, tok, lit = s.Scan()
-				if errs.Len() > 0 {
-					return errs.Err()
-				}
-			}
-			if tok != token.RBRACK {
-				if sectsub == "" {
-					return errfn("expected subsection name or right bracket")
-				}
-				return errfn("expected right bracket")
-			}
-			pos, tok, lit = s.Scan()
-			if tok != token.EOL && tok != token.EOF && tok != token.COMMENT {
-				return errfn("expected EOL, EOF, or comment")
-			}
-			// If a section/subsection header was found, ensure a
-			// container object is created, even if there are no
-			// variables further down.
-			err := set(config, sect, sectsub, "", true, "")
-			if err != nil {
-				return err
-			}
-		case token.IDENT:
-			if sect == "" {
-				return errfn("expected section header")
-			}
-			n := lit
-			pos, tok, lit = s.Scan()
-			if errs.Len() > 0 {
-				return errs.Err()
-			}
-			blank, v := tok == token.EOF || tok == token.EOL || tok == token.COMMENT, ""
-			if !blank {
-				if tok != token.ASSIGN {
-					return errfn("expected '='")
-				}
-				pos, tok, lit = s.Scan()
-				if errs.Len() > 0 {
-					return errs.Err()
-				}
-				if tok != token.STRING {
-					return errfn("expected value")
-				}
-				v = unquote(lit)
-				pos, tok, lit = s.Scan()
-				if errs.Len() > 0 {
-					return errs.Err()
-				}
-				if tok != token.EOL && tok != token.EOF && tok != token.COMMENT {
-					return errfn("expected EOL, EOF, or comment")
-				}
-			}
-			err := set(config, sect, sectsub, n, blank, v)
-			if err != nil {
-				return err
-			}
-		default:
-			if sect == "" {
-				return errfn("expected section header")
-			}
-			return errfn("expected section header or variable declaration")
-		}
-	}
-	panic("never reached")
-}
-
-// ReadInto reads gcfg formatted data from reader and sets the values into the
-// corresponding fields in config.
-func ReadInto(config interface{}, reader io.Reader) error {
-	src, err := ioutil.ReadAll(reader)
-	if err != nil {
-		return err
-	}
-	fset := token.NewFileSet()
-	file := fset.AddFile("", fset.Base(), len(src))
-	return readInto(config, fset, file, src)
-}
-
-// ReadStringInto reads gcfg formatted data from str and sets the values into
-// the corresponding fields in config.
-func ReadStringInto(config interface{}, str string) error {
-	r := strings.NewReader(str)
-	return ReadInto(config, r)
-}
-
-// ReadFileInto reads gcfg formatted data from the file filename and sets the
-// values into the corresponding fields in config.
-func ReadFileInto(config interface{}, filename string) error {
-	f, err := os.Open(filename)
-	if err != nil {
-		return err
-	}
-	defer f.Close()
-	src, err := ioutil.ReadAll(f)
-	if err != nil {
-		return err
-	}
-	fset := token.NewFileSet()
-	file := fset.AddFile(filename, fset.Base(), len(src))
-	return readInto(config, fset, file, src)
-}
diff --git a/vendor/gopkg.in/gcfg.v1/scanner/errors.go b/vendor/gopkg.in/gcfg.v1/scanner/errors.go
deleted file mode 100644
index 1a3c0f65..00000000
--- a/vendor/gopkg.in/gcfg.v1/scanner/errors.go
+++ /dev/null
@@ -1,121 +0,0 @@
-// Copyright 2009 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package scanner
-
-import (
-	"fmt"
-	"io"
-	"sort"
-)
-
-import (
-	"gopkg.in/gcfg.v1/token"
-)
-
-// In an ErrorList, an error is represented by an *Error.
-// The position Pos, if valid, points to the beginning of
-// the offending token, and the error condition is described
-// by Msg.
-//
-type Error struct {
-	Pos token.Position
-	Msg string
-}
-
-// Error implements the error interface.
-func (e Error) Error() string {
-	if e.Pos.Filename != "" || e.Pos.IsValid() {
-		// don't print "<unknown position>"
-		// TODO(gri) reconsider the semantics of Position.IsValid
-		return e.Pos.String() + ": " + e.Msg
-	}
-	return e.Msg
-}
-
-// ErrorList is a list of *Errors.
-// The zero value for an ErrorList is an empty ErrorList ready to use.
-//
-type ErrorList []*Error
-
-// Add adds an Error with given position and error message to an ErrorList.
-func (p *ErrorList) Add(pos token.Position, msg string) {
-	*p = append(*p, &Error{pos, msg})
-}
-
-// Reset resets an ErrorList to no errors.
-func (p *ErrorList) Reset() { *p = (*p)[0:0] }
-
-// ErrorList implements the sort Interface.
-func (p ErrorList) Len() int      { return len(p) }
-func (p ErrorList) Swap(i, j int) { p[i], p[j] = p[j], p[i] }
-
-func (p ErrorList) Less(i, j int) bool {
-	e := &p[i].Pos
-	f := &p[j].Pos
-	if e.Filename < f.Filename {
-		return true
-	}
-	if e.Filename == f.Filename {
-		return e.Offset < f.Offset
-	}
-	return false
-}
-
-// Sort sorts an ErrorList. *Error entries are sorted by position,
-// other errors are sorted by error message, and before any *Error
-// entry.
-//
-func (p ErrorList) Sort() {
-	sort.Sort(p)
-}
-
-// RemoveMultiples sorts an ErrorList and removes all but the first error per line.
-func (p *ErrorList) RemoveMultiples() {
-	sort.Sort(p)
-	var last token.Position // initial last.Line is != any legal error line
-	i := 0
-	for _, e := range *p {
-		if e.Pos.Filename != last.Filename || e.Pos.Line != last.Line {
-			last = e.Pos
-			(*p)[i] = e
-			i++
-		}
-	}
-	(*p) = (*p)[0:i]
-}
-
-// An ErrorList implements the error interface.
-func (p ErrorList) Error() string {
-	switch len(p) {
-	case 0:
-		return "no errors"
-	case 1:
-		return p[0].Error()
-	}
-	return fmt.Sprintf("%s (and %d more errors)", p[0], len(p)-1)
-}
-
-// Err returns an error equivalent to this error list.
-// If the list is empty, Err returns nil.
-func (p ErrorList) Err() error {
-	if len(p) == 0 {
-		return nil
-	}
-	return p
-}
-
-// PrintError is a utility function that prints a list of errors to w,
-// one error per line, if the err parameter is an ErrorList. Otherwise
-// it prints the err string.
-//
-func PrintError(w io.Writer, err error) {
-	if list, ok := err.(ErrorList); ok {
-		for _, e := range list {
-			fmt.Fprintf(w, "%s\n", e)
-		}
-	} else if err != nil {
-		fmt.Fprintf(w, "%s\n", err)
-	}
-}
diff --git a/vendor/gopkg.in/gcfg.v1/scanner/scanner.go b/vendor/gopkg.in/gcfg.v1/scanner/scanner.go
deleted file mode 100644
index bbbdbf53..00000000
--- a/vendor/gopkg.in/gcfg.v1/scanner/scanner.go
+++ /dev/null
@@ -1,342 +0,0 @@
-// Copyright 2009 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// Package scanner implements a scanner for gcfg configuration text.
-// It takes a []byte as source which can then be tokenized
-// through repeated calls to the Scan method.
-//
-// Note that the API for the scanner package may change to accommodate new
-// features or implementation changes in gcfg.
-//
-package scanner
-
-import (
-	"fmt"
-	"path/filepath"
-	"unicode"
-	"unicode/utf8"
-)
-
-import (
-	"gopkg.in/gcfg.v1/token"
-)
-
-// An ErrorHandler may be provided to Scanner.Init. If a syntax error is
-// encountered and a handler was installed, the handler is called with a
-// position and an error message. The position points to the beginning of
-// the offending token.
-//
-type ErrorHandler func(pos token.Position, msg string)
-
-// A Scanner holds the scanner's internal state while processing
-// a given text.  It can be allocated as part of another data
-// structure but must be initialized via Init before use.
-//
-type Scanner struct {
-	// immutable state
-	file *token.File  // source file handle
-	dir  string       // directory portion of file.Name()
-	src  []byte       // source
-	err  ErrorHandler // error reporting; or nil
-	mode Mode         // scanning mode
-
-	// scanning state
-	ch         rune // current character
-	offset     int  // character offset
-	rdOffset   int  // reading offset (position after current character)
-	lineOffset int  // current line offset
-	nextVal    bool // next token is expected to be a value
-
-	// public state - ok to modify
-	ErrorCount int // number of errors encountered
-}
-
-// Read the next Unicode char into s.ch.
-// s.ch < 0 means end-of-file.
-//
-func (s *Scanner) next() {
-	if s.rdOffset < len(s.src) {
-		s.offset = s.rdOffset
-		if s.ch == '\n' {
-			s.lineOffset = s.offset
-			s.file.AddLine(s.offset)
-		}
-		r, w := rune(s.src[s.rdOffset]), 1
-		switch {
-		case r == 0:
-			s.error(s.offset, "illegal character NUL")
-		case r >= 0x80:
-			// not ASCII
-			r, w = utf8.DecodeRune(s.src[s.rdOffset:])
-			if r == utf8.RuneError && w == 1 {
-				s.error(s.offset, "illegal UTF-8 encoding")
-			}
-		}
-		s.rdOffset += w
-		s.ch = r
-	} else {
-		s.offset = len(s.src)
-		if s.ch == '\n' {
-			s.lineOffset = s.offset
-			s.file.AddLine(s.offset)
-		}
-		s.ch = -1 // eof
-	}
-}
-
-// A mode value is a set of flags (or 0).
-// They control scanner behavior.
-//
-type Mode uint
-
-const (
-	ScanComments Mode = 1 << iota // return comments as COMMENT tokens
-)
-
-// Init prepares the scanner s to tokenize the text src by setting the
-// scanner at the beginning of src. The scanner uses the file set file
-// for position information and it adds line information for each line.
-// It is ok to re-use the same file when re-scanning the same file as
-// line information which is already present is ignored. Init causes a
-// panic if the file size does not match the src size.
-//
-// Calls to Scan will invoke the error handler err if they encounter a
-// syntax error and err is not nil. Also, for each error encountered,
-// the Scanner field ErrorCount is incremented by one. The mode parameter
-// determines how comments are handled.
-//
-// Note that Init may call err if there is an error in the first character
-// of the file.
-//
-func (s *Scanner) Init(file *token.File, src []byte, err ErrorHandler, mode Mode) {
-	// Explicitly initialize all fields since a scanner may be reused.
-	if file.Size() != len(src) {
-		panic(fmt.Sprintf("file size (%d) does not match src len (%d)", file.Size(), len(src)))
-	}
-	s.file = file
-	s.dir, _ = filepath.Split(file.Name())
-	s.src = src
-	s.err = err
-	s.mode = mode
-
-	s.ch = ' '
-	s.offset = 0
-	s.rdOffset = 0
-	s.lineOffset = 0
-	s.ErrorCount = 0
-	s.nextVal = false
-
-	s.next()
-}
-
-func (s *Scanner) error(offs int, msg string) {
-	if s.err != nil {
-		s.err(s.file.Position(s.file.Pos(offs)), msg)
-	}
-	s.ErrorCount++
-}
-
-func (s *Scanner) scanComment() string {
-	// initial [;#] already consumed
-	offs := s.offset - 1 // position of initial [;#]
-
-	for s.ch != '\n' && s.ch >= 0 {
-		s.next()
-	}
-	return string(s.src[offs:s.offset])
-}
-
-func isLetter(ch rune) bool {
-	return 'a' <= ch && ch <= 'z' || 'A' <= ch && ch <= 'Z' || ch >= 0x80 && unicode.IsLetter(ch)
-}
-
-func isDigit(ch rune) bool {
-	return '0' <= ch && ch <= '9' || ch >= 0x80 && unicode.IsDigit(ch)
-}
-
-func (s *Scanner) scanIdentifier() string {
-	offs := s.offset
-	for isLetter(s.ch) || isDigit(s.ch) || s.ch == '-' {
-		s.next()
-	}
-	return string(s.src[offs:s.offset])
-}
-
-func (s *Scanner) scanEscape(val bool) {
-	offs := s.offset
-	ch := s.ch
-	s.next() // always make progress
-	switch ch {
-	case '\\', '"':
-		// ok
-	case 'n', 't':
-		if val {
-			break // ok
-		}
-		fallthrough
-	default:
-		s.error(offs, "unknown escape sequence")
-	}
-}
-
-func (s *Scanner) scanString() string {
-	// '"' opening already consumed
-	offs := s.offset - 1
-
-	for s.ch != '"' {
-		ch := s.ch
-		s.next()
-		if ch == '\n' || ch < 0 {
-			s.error(offs, "string not terminated")
-			break
-		}
-		if ch == '\\' {
-			s.scanEscape(false)
-		}
-	}
-
-	s.next()
-
-	return string(s.src[offs:s.offset])
-}
-
-func stripCR(b []byte) []byte {
-	c := make([]byte, len(b))
-	i := 0
-	for _, ch := range b {
-		if ch != '\r' {
-			c[i] = ch
-			i++
-		}
-	}
-	return c[:i]
-}
-
-func (s *Scanner) scanValString() string {
-	offs := s.offset
-
-	hasCR := false
-	end := offs
-	inQuote := false
-loop:
-	for inQuote || s.ch >= 0 && s.ch != '\n' && s.ch != ';' && s.ch != '#' {
-		ch := s.ch
-		s.next()
-		switch {
-		case inQuote && ch == '\\':
-			s.scanEscape(true)
-		case !inQuote && ch == '\\':
-			if s.ch == '\r' {
-				hasCR = true
-				s.next()
-			}
-			if s.ch != '\n' {
-				s.error(offs, "unquoted '\\' must be followed by new line")
-				break loop
-			}
-			s.next()
-		case ch == '"':
-			inQuote = !inQuote
-		case ch == '\r':
-			hasCR = true
-		case ch < 0 || inQuote && ch == '\n':
-			s.error(offs, "string not terminated")
-			break loop
-		}
-		if inQuote || !isWhiteSpace(ch) {
-			end = s.offset
-		}
-	}
-
-	lit := s.src[offs:end]
-	if hasCR {
-		lit = stripCR(lit)
-	}
-
-	return string(lit)
-}
-
-func isWhiteSpace(ch rune) bool {
-	return ch == ' ' || ch == '\t' || ch == '\r'
-}
-
-func (s *Scanner) skipWhitespace() {
-	for isWhiteSpace(s.ch) {
-		s.next()
-	}
-}
-
-// Scan scans the next token and returns the token position, the token,
-// and its literal string if applicable. The source end is indicated by
-// token.EOF.
-//
-// If the returned token is a literal (token.IDENT, token.STRING) or
-// token.COMMENT, the literal string has the corresponding value.
-//
-// If the returned token is token.ILLEGAL, the literal string is the
-// offending character.
-//
-// In all other cases, Scan returns an empty literal string.
-//
-// For more tolerant parsing, Scan will return a valid token if
-// possible even if a syntax error was encountered. Thus, even
-// if the resulting token sequence contains no illegal tokens,
-// a client may not assume that no error occurred. Instead it
-// must check the scanner's ErrorCount or the number of calls
-// of the error handler, if there was one installed.
-//
-// Scan adds line information to the file added to the file
-// set with Init. Token positions are relative to that file
-// and thus relative to the file set.
-//
-func (s *Scanner) Scan() (pos token.Pos, tok token.Token, lit string) {
-scanAgain:
-	s.skipWhitespace()
-
-	// current token start
-	pos = s.file.Pos(s.offset)
-
-	// determine token value
-	switch ch := s.ch; {
-	case s.nextVal:
-		lit = s.scanValString()
-		tok = token.STRING
-		s.nextVal = false
-	case isLetter(ch):
-		lit = s.scanIdentifier()
-		tok = token.IDENT
-	default:
-		s.next() // always make progress
-		switch ch {
-		case -1:
-			tok = token.EOF
-		case '\n':
-			tok = token.EOL
-		case '"':
-			tok = token.STRING
-			lit = s.scanString()
-		case '[':
-			tok = token.LBRACK
-		case ']':
-			tok = token.RBRACK
-		case ';', '#':
-			// comment
-			lit = s.scanComment()
-			if s.mode&ScanComments == 0 {
-				// skip comment
-				goto scanAgain
-			}
-			tok = token.COMMENT
-		case '=':
-			tok = token.ASSIGN
-			s.nextVal = true
-		default:
-			s.error(s.file.Offset(pos), fmt.Sprintf("illegal character %#U", ch))
-			tok = token.ILLEGAL
-			lit = string(ch)
-		}
-	}
-
-	return
-}
diff --git a/vendor/gopkg.in/gcfg.v1/set.go b/vendor/gopkg.in/gcfg.v1/set.go
deleted file mode 100644
index 7252b689..00000000
--- a/vendor/gopkg.in/gcfg.v1/set.go
+++ /dev/null
@@ -1,293 +0,0 @@
-package gcfg
-
-import (
-	"fmt"
-	"math/big"
-	"reflect"
-	"strings"
-	"unicode"
-	"unicode/utf8"
-
-	"gopkg.in/gcfg.v1/types"
-)
-
-type tag struct {
-	ident   string
-	intMode string
-}
-
-func newTag(ts string) tag {
-	t := tag{}
-	s := strings.Split(ts, ",")
-	t.ident = s[0]
-	for _, tse := range s[1:] {
-		if strings.HasPrefix(tse, "int=") {
-			t.intMode = tse[len("int="):]
-		}
-	}
-	return t
-}
-
-func fieldFold(v reflect.Value, name string) (reflect.Value, tag) {
-	var n string
-	r0, _ := utf8.DecodeRuneInString(name)
-	if unicode.IsLetter(r0) && !unicode.IsLower(r0) && !unicode.IsUpper(r0) {
-		n = "X"
-	}
-	n += strings.Replace(name, "-", "_", -1)
-	f, ok := v.Type().FieldByNameFunc(func(fieldName string) bool {
-		if !v.FieldByName(fieldName).CanSet() {
-			return false
-		}
-		f, _ := v.Type().FieldByName(fieldName)
-		t := newTag(f.Tag.Get("gcfg"))
-		if t.ident != "" {
-			return strings.EqualFold(t.ident, name)
-		}
-		return strings.EqualFold(n, fieldName)
-	})
-	if !ok {
-		return reflect.Value{}, tag{}
-	}
-	return v.FieldByName(f.Name), newTag(f.Tag.Get("gcfg"))
-}
-
-type setter func(destp interface{}, blank bool, val string, t tag) error
-
-var errUnsupportedType = fmt.Errorf("unsupported type")
-var errBlankUnsupported = fmt.Errorf("blank value not supported for type")
-
-var setters = []setter{
-	typeSetter, textUnmarshalerSetter, kindSetter, scanSetter,
-}
-
-func textUnmarshalerSetter(d interface{}, blank bool, val string, t tag) error {
-	dtu, ok := d.(textUnmarshaler)
-	if !ok {
-		return errUnsupportedType
-	}
-	if blank {
-		return errBlankUnsupported
-	}
-	return dtu.UnmarshalText([]byte(val))
-}
-
-func boolSetter(d interface{}, blank bool, val string, t tag) error {
-	if blank {
-		reflect.ValueOf(d).Elem().Set(reflect.ValueOf(true))
-		return nil
-	}
-	b, err := types.ParseBool(val)
-	if err == nil {
-		reflect.ValueOf(d).Elem().Set(reflect.ValueOf(b))
-	}
-	return err
-}
-
-func intMode(mode string) types.IntMode {
-	var m types.IntMode
-	if strings.ContainsAny(mode, "dD") {
-		m |= types.Dec
-	}
-	if strings.ContainsAny(mode, "hH") {
-		m |= types.Hex
-	}
-	if strings.ContainsAny(mode, "oO") {
-		m |= types.Oct
-	}
-	return m
-}
-
-var typeModes = map[reflect.Type]types.IntMode{
-	reflect.TypeOf(int(0)):    types.Dec | types.Hex,
-	reflect.TypeOf(int8(0)):   types.Dec | types.Hex,
-	reflect.TypeOf(int16(0)):  types.Dec | types.Hex,
-	reflect.TypeOf(int32(0)):  types.Dec | types.Hex,
-	reflect.TypeOf(int64(0)):  types.Dec | types.Hex,
-	reflect.TypeOf(uint(0)):   types.Dec | types.Hex,
-	reflect.TypeOf(uint8(0)):  types.Dec | types.Hex,
-	reflect.TypeOf(uint16(0)): types.Dec | types.Hex,
-	reflect.TypeOf(uint32(0)): types.Dec | types.Hex,
-	reflect.TypeOf(uint64(0)): types.Dec | types.Hex,
-	// use default mode (allow dec/hex/oct) for uintptr type
-	reflect.TypeOf(big.Int{}): types.Dec | types.Hex,
-}
-
-func intModeDefault(t reflect.Type) types.IntMode {
-	m, ok := typeModes[t]
-	if !ok {
-		m = types.Dec | types.Hex | types.Oct
-	}
-	return m
-}
-
-func intSetter(d interface{}, blank bool, val string, t tag) error {
-	if blank {
-		return errBlankUnsupported
-	}
-	mode := intMode(t.intMode)
-	if mode == 0 {
-		mode = intModeDefault(reflect.TypeOf(d).Elem())
-	}
-	return types.ParseInt(d, val, mode)
-}
-
-func stringSetter(d interface{}, blank bool, val string, t tag) error {
-	if blank {
-		return errBlankUnsupported
-	}
-	dsp, ok := d.(*string)
-	if !ok {
-		return errUnsupportedType
-	}
-	*dsp = val
-	return nil
-}
-
-var kindSetters = map[reflect.Kind]setter{
-	reflect.String:  stringSetter,
-	reflect.Bool:    boolSetter,
-	reflect.Int:     intSetter,
-	reflect.Int8:    intSetter,
-	reflect.Int16:   intSetter,
-	reflect.Int32:   intSetter,
-	reflect.Int64:   intSetter,
-	reflect.Uint:    intSetter,
-	reflect.Uint8:   intSetter,
-	reflect.Uint16:  intSetter,
-	reflect.Uint32:  intSetter,
-	reflect.Uint64:  intSetter,
-	reflect.Uintptr: intSetter,
-}
-
-var typeSetters = map[reflect.Type]setter{
-	reflect.TypeOf(big.Int{}): intSetter,
-}
-
-func typeSetter(d interface{}, blank bool, val string, tt tag) error {
-	t := reflect.ValueOf(d).Type().Elem()
-	setter, ok := typeSetters[t]
-	if !ok {
-		return errUnsupportedType
-	}
-	return setter(d, blank, val, tt)
-}
-
-func kindSetter(d interface{}, blank bool, val string, tt tag) error {
-	k := reflect.ValueOf(d).Type().Elem().Kind()
-	setter, ok := kindSetters[k]
-	if !ok {
-		return errUnsupportedType
-	}
-	return setter(d, blank, val, tt)
-}
-
-func scanSetter(d interface{}, blank bool, val string, tt tag) error {
-	if blank {
-		return errBlankUnsupported
-	}
-	return types.ScanFully(d, val, 'v')
-}
-
-func set(cfg interface{}, sect, sub, name string, blank bool, value string) error {
-	vPCfg := reflect.ValueOf(cfg)
-	if vPCfg.Kind() != reflect.Ptr || vPCfg.Elem().Kind() != reflect.Struct {
-		panic(fmt.Errorf("config must be a pointer to a struct"))
-	}
-	vCfg := vPCfg.Elem()
-	vSect, _ := fieldFold(vCfg, sect)
-	if !vSect.IsValid() {
-		return fmt.Errorf("invalid section: section %q", sect)
-	}
-	if vSect.Kind() == reflect.Map {
-		vst := vSect.Type()
-		if vst.Key().Kind() != reflect.String ||
-			vst.Elem().Kind() != reflect.Ptr ||
-			vst.Elem().Elem().Kind() != reflect.Struct {
-			panic(fmt.Errorf("map field for section must have string keys and "+
-				" pointer-to-struct values: section %q", sect))
-		}
-		if vSect.IsNil() {
-			vSect.Set(reflect.MakeMap(vst))
-		}
-		k := reflect.ValueOf(sub)
-		pv := vSect.MapIndex(k)
-		if !pv.IsValid() {
-			vType := vSect.Type().Elem().Elem()
-			pv = reflect.New(vType)
-			vSect.SetMapIndex(k, pv)
-		}
-		vSect = pv.Elem()
-	} else if vSect.Kind() != reflect.Struct {
-		panic(fmt.Errorf("field for section must be a map or a struct: "+
-			"section %q", sect))
-	} else if sub != "" {
-		return fmt.Errorf("invalid subsection: "+
-			"section %q subsection %q", sect, sub)
-	}
-	// Empty name is a special value, meaning that only the
-	// section/subsection object is to be created, with no values set.
-	if name == "" {
-		return nil
-	}
-	vVar, t := fieldFold(vSect, name)
-	if !vVar.IsValid() {
-		return fmt.Errorf("invalid variable: "+
-			"section %q subsection %q variable %q", sect, sub, name)
-	}
-	// vVal is either single-valued var, or newly allocated value within multi-valued var
-	var vVal reflect.Value
-	// multi-value if unnamed slice type
-	isMulti := vVar.Type().Name() == "" && vVar.Kind() == reflect.Slice ||
-		vVar.Type().Name() == "" && vVar.Kind() == reflect.Ptr && vVar.Type().Elem().Name() == "" && vVar.Type().Elem().Kind() == reflect.Slice
-	if isMulti && vVar.Kind() == reflect.Ptr {
-		if vVar.IsNil() {
-			vVar.Set(reflect.New(vVar.Type().Elem()))
-		}
-		vVar = vVar.Elem()
-	}
-	if isMulti && blank {
-		vVar.Set(reflect.Zero(vVar.Type()))
-		return nil
-	}
-	if isMulti {
-		vVal = reflect.New(vVar.Type().Elem()).Elem()
-	} else {
-		vVal = vVar
-	}
-	isDeref := vVal.Type().Name() == "" && vVal.Type().Kind() == reflect.Ptr
-	isNew := isDeref && vVal.IsNil()
-	// vAddr is address of value to set (dereferenced & allocated as needed)
-	var vAddr reflect.Value
-	switch {
-	case isNew:
-		vAddr = reflect.New(vVal.Type().Elem())
-	case isDeref && !isNew:
-		vAddr = vVal
-	default:
-		vAddr = vVal.Addr()
-	}
-	vAddrI := vAddr.Interface()
-	err, ok := error(nil), false
-	for _, s := range setters {
-		err = s(vAddrI, blank, value, t)
-		if err == nil {
-			ok = true
-			break
-		}
-		if err != errUnsupportedType {
-			return err
-		}
-	}
-	if !ok {
-		// in case all setters returned errUnsupportedType
-		return err
-	}
-	if isNew { // set reference if it was dereferenced and newly allocated
-		vVal.Set(vAddr)
-	}
-	if isMulti { // append if multi-valued
-		vVar.Set(reflect.Append(vVar, vVal))
-	}
-	return nil
-}
diff --git a/vendor/gopkg.in/gcfg.v1/token/position.go b/vendor/gopkg.in/gcfg.v1/token/position.go
deleted file mode 100644
index fc45c1e7..00000000
--- a/vendor/gopkg.in/gcfg.v1/token/position.go
+++ /dev/null
@@ -1,435 +0,0 @@
-// Copyright 2010 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// TODO(gri) consider making this a separate package outside the go directory.
-
-package token
-
-import (
-	"fmt"
-	"sort"
-	"sync"
-)
-
-// -----------------------------------------------------------------------------
-// Positions
-
-// Position describes an arbitrary source position
-// including the file, line, and column location.
-// A Position is valid if the line number is > 0.
-//
-type Position struct {
-	Filename string // filename, if any
-	Offset   int    // offset, starting at 0
-	Line     int    // line number, starting at 1
-	Column   int    // column number, starting at 1 (character count)
-}
-
-// IsValid returns true if the position is valid.
-func (pos *Position) IsValid() bool { return pos.Line > 0 }
-
-// String returns a string in one of several forms:
-//
-//	file:line:column    valid position with file name
-//	line:column         valid position without file name
-//	file                invalid position with file name
-//	-                   invalid position without file name
-//
-func (pos Position) String() string {
-	s := pos.Filename
-	if pos.IsValid() {
-		if s != "" {
-			s += ":"
-		}
-		s += fmt.Sprintf("%d:%d", pos.Line, pos.Column)
-	}
-	if s == "" {
-		s = "-"
-	}
-	return s
-}
-
-// Pos is a compact encoding of a source position within a file set.
-// It can be converted into a Position for a more convenient, but much
-// larger, representation.
-//
-// The Pos value for a given file is a number in the range [base, base+size],
-// where base and size are specified when adding the file to the file set via
-// AddFile.
-//
-// To create the Pos value for a specific source offset, first add
-// the respective file to the current file set (via FileSet.AddFile)
-// and then call File.Pos(offset) for that file. Given a Pos value p
-// for a specific file set fset, the corresponding Position value is
-// obtained by calling fset.Position(p).
-//
-// Pos values can be compared directly with the usual comparison operators:
-// If two Pos values p and q are in the same file, comparing p and q is
-// equivalent to comparing the respective source file offsets. If p and q
-// are in different files, p < q is true if the file implied by p was added
-// to the respective file set before the file implied by q.
-//
-type Pos int
-
-// The zero value for Pos is NoPos; there is no file and line information
-// associated with it, and NoPos().IsValid() is false. NoPos is always
-// smaller than any other Pos value. The corresponding Position value
-// for NoPos is the zero value for Position.
-//
-const NoPos Pos = 0
-
-// IsValid returns true if the position is valid.
-func (p Pos) IsValid() bool {
-	return p != NoPos
-}
-
-// -----------------------------------------------------------------------------
-// File
-
-// A File is a handle for a file belonging to a FileSet.
-// A File has a name, size, and line offset table.
-//
-type File struct {
-	set  *FileSet
-	name string // file name as provided to AddFile
-	base int    // Pos value range for this file is [base...base+size]
-	size int    // file size as provided to AddFile
-
-	// lines and infos are protected by set.mutex
-	lines []int
-	infos []lineInfo
-}
-
-// Name returns the file name of file f as registered with AddFile.
-func (f *File) Name() string {
-	return f.name
-}
-
-// Base returns the base offset of file f as registered with AddFile.
-func (f *File) Base() int {
-	return f.base
-}
-
-// Size returns the size of file f as registered with AddFile.
-func (f *File) Size() int {
-	return f.size
-}
-
-// LineCount returns the number of lines in file f.
-func (f *File) LineCount() int {
-	f.set.mutex.RLock()
-	n := len(f.lines)
-	f.set.mutex.RUnlock()
-	return n
-}
-
-// AddLine adds the line offset for a new line.
-// The line offset must be larger than the offset for the previous line
-// and smaller than the file size; otherwise the line offset is ignored.
-//
-func (f *File) AddLine(offset int) {
-	f.set.mutex.Lock()
-	if i := len(f.lines); (i == 0 || f.lines[i-1] < offset) && offset < f.size {
-		f.lines = append(f.lines, offset)
-	}
-	f.set.mutex.Unlock()
-}
-
-// SetLines sets the line offsets for a file and returns true if successful.
-// The line offsets are the offsets of the first character of each line;
-// for instance for the content "ab\nc\n" the line offsets are {0, 3}.
-// An empty file has an empty line offset table.
-// Each line offset must be larger than the offset for the previous line
-// and smaller than the file size; otherwise SetLines fails and returns
-// false.
-//
-func (f *File) SetLines(lines []int) bool {
-	// verify validity of lines table
-	size := f.size
-	for i, offset := range lines {
-		if i > 0 && offset <= lines[i-1] || size <= offset {
-			return false
-		}
-	}
-
-	// set lines table
-	f.set.mutex.Lock()
-	f.lines = lines
-	f.set.mutex.Unlock()
-	return true
-}
-
-// SetLinesForContent sets the line offsets for the given file content.
-func (f *File) SetLinesForContent(content []byte) {
-	var lines []int
-	line := 0
-	for offset, b := range content {
-		if line >= 0 {
-			lines = append(lines, line)
-		}
-		line = -1
-		if b == '\n' {
-			line = offset + 1
-		}
-	}
-
-	// set lines table
-	f.set.mutex.Lock()
-	f.lines = lines
-	f.set.mutex.Unlock()
-}
-
-// A lineInfo object describes alternative file and line number
-// information (such as provided via a //line comment in a .go
-// file) for a given file offset.
-type lineInfo struct {
-	// fields are exported to make them accessible to gob
-	Offset   int
-	Filename string
-	Line     int
-}
-
-// AddLineInfo adds alternative file and line number information for
-// a given file offset. The offset must be larger than the offset for
-// the previously added alternative line info and smaller than the
-// file size; otherwise the information is ignored.
-//
-// AddLineInfo is typically used to register alternative position
-// information for //line filename:line comments in source files.
-//
-func (f *File) AddLineInfo(offset int, filename string, line int) {
-	f.set.mutex.Lock()
-	if i := len(f.infos); i == 0 || f.infos[i-1].Offset < offset && offset < f.size {
-		f.infos = append(f.infos, lineInfo{offset, filename, line})
-	}
-	f.set.mutex.Unlock()
-}
-
-// Pos returns the Pos value for the given file offset;
-// the offset must be <= f.Size().
-// f.Pos(f.Offset(p)) == p.
-//
-func (f *File) Pos(offset int) Pos {
-	if offset > f.size {
-		panic("illegal file offset")
-	}
-	return Pos(f.base + offset)
-}
-
-// Offset returns the offset for the given file position p;
-// p must be a valid Pos value in that file.
-// f.Offset(f.Pos(offset)) == offset.
-//
-func (f *File) Offset(p Pos) int {
-	if int(p) < f.base || int(p) > f.base+f.size {
-		panic("illegal Pos value")
-	}
-	return int(p) - f.base
-}
-
-// Line returns the line number for the given file position p;
-// p must be a Pos value in that file or NoPos.
-//
-func (f *File) Line(p Pos) int {
-	// TODO(gri) this can be implemented much more efficiently
-	return f.Position(p).Line
-}
-
-func searchLineInfos(a []lineInfo, x int) int {
-	return sort.Search(len(a), func(i int) bool { return a[i].Offset > x }) - 1
-}
-
-// info returns the file name, line, and column number for a file offset.
-func (f *File) info(offset int) (filename string, line, column int) {
-	filename = f.name
-	if i := searchInts(f.lines, offset); i >= 0 {
-		line, column = i+1, offset-f.lines[i]+1
-	}
-	if len(f.infos) > 0 {
-		// almost no files have extra line infos
-		if i := searchLineInfos(f.infos, offset); i >= 0 {
-			alt := &f.infos[i]
-			filename = alt.Filename
-			if i := searchInts(f.lines, alt.Offset); i >= 0 {
-				line += alt.Line - i - 1
-			}
-		}
-	}
-	return
-}
-
-func (f *File) position(p Pos) (pos Position) {
-	offset := int(p) - f.base
-	pos.Offset = offset
-	pos.Filename, pos.Line, pos.Column = f.info(offset)
-	return
-}
-
-// Position returns the Position value for the given file position p;
-// p must be a Pos value in that file or NoPos.
-//
-func (f *File) Position(p Pos) (pos Position) {
-	if p != NoPos {
-		if int(p) < f.base || int(p) > f.base+f.size {
-			panic("illegal Pos value")
-		}
-		pos = f.position(p)
-	}
-	return
-}
-
-// -----------------------------------------------------------------------------
-// FileSet
-
-// A FileSet represents a set of source files.
-// Methods of file sets are synchronized; multiple goroutines
-// may invoke them concurrently.
-//
-type FileSet struct {
-	mutex sync.RWMutex // protects the file set
-	base  int          // base offset for the next file
-	files []*File      // list of files in the order added to the set
-	last  *File        // cache of last file looked up
-}
-
-// NewFileSet creates a new file set.
-func NewFileSet() *FileSet {
-	s := new(FileSet)
-	s.base = 1 // 0 == NoPos
-	return s
-}
-
-// Base returns the minimum base offset that must be provided to
-// AddFile when adding the next file.
-//
-func (s *FileSet) Base() int {
-	s.mutex.RLock()
-	b := s.base
-	s.mutex.RUnlock()
-	return b
-
-}
-
-// AddFile adds a new file with a given filename, base offset, and file size
-// to the file set s and returns the file. Multiple files may have the same
-// name. The base offset must not be smaller than the FileSet's Base(), and
-// size must not be negative.
-//
-// Adding the file will set the file set's Base() value to base + size + 1
-// as the minimum base value for the next file. The following relationship
-// exists between a Pos value p for a given file offset offs:
-//
-//	int(p) = base + offs
-//
-// with offs in the range [0, size] and thus p in the range [base, base+size].
-// For convenience, File.Pos may be used to create file-specific position
-// values from a file offset.
-//
-func (s *FileSet) AddFile(filename string, base, size int) *File {
-	s.mutex.Lock()
-	defer s.mutex.Unlock()
-	if base < s.base || size < 0 {
-		panic("illegal base or size")
-	}
-	// base >= s.base && size >= 0
-	f := &File{s, filename, base, size, []int{0}, nil}
-	base += size + 1 // +1 because EOF also has a position
-	if base < 0 {
-		panic("token.Pos offset overflow (> 2G of source code in file set)")
-	}
-	// add the file to the file set
-	s.base = base
-	s.files = append(s.files, f)
-	s.last = f
-	return f
-}
-
-// Iterate calls f for the files in the file set in the order they were added
-// until f returns false.
-//
-func (s *FileSet) Iterate(f func(*File) bool) {
-	for i := 0; ; i++ {
-		var file *File
-		s.mutex.RLock()
-		if i < len(s.files) {
-			file = s.files[i]
-		}
-		s.mutex.RUnlock()
-		if file == nil || !f(file) {
-			break
-		}
-	}
-}
-
-func searchFiles(a []*File, x int) int {
-	return sort.Search(len(a), func(i int) bool { return a[i].base > x }) - 1
-}
-
-func (s *FileSet) file(p Pos) *File {
-	// common case: p is in last file
-	if f := s.last; f != nil && f.base <= int(p) && int(p) <= f.base+f.size {
-		return f
-	}
-	// p is not in last file - search all files
-	if i := searchFiles(s.files, int(p)); i >= 0 {
-		f := s.files[i]
-		// f.base <= int(p) by definition of searchFiles
-		if int(p) <= f.base+f.size {
-			s.last = f
-			return f
-		}
-	}
-	return nil
-}
-
-// File returns the file that contains the position p.
-// If no such file is found (for instance for p == NoPos),
-// the result is nil.
-//
-func (s *FileSet) File(p Pos) (f *File) {
-	if p != NoPos {
-		s.mutex.RLock()
-		f = s.file(p)
-		s.mutex.RUnlock()
-	}
-	return
-}
-
-// Position converts a Pos in the fileset into a general Position.
-func (s *FileSet) Position(p Pos) (pos Position) {
-	if p != NoPos {
-		s.mutex.RLock()
-		if f := s.file(p); f != nil {
-			pos = f.position(p)
-		}
-		s.mutex.RUnlock()
-	}
-	return
-}
-
-// -----------------------------------------------------------------------------
-// Helper functions
-
-func searchInts(a []int, x int) int {
-	// This function body is a manually inlined version of:
-	//
-	//   return sort.Search(len(a), func(i int) bool { return a[i] > x }) - 1
-	//
-	// With better compiler optimizations, this may not be needed in the
-	// future, but at the moment this change improves the go/printer
-	// benchmark performance by ~30%. This has a direct impact on the
-	// speed of gofmt and thus seems worthwhile (2011-04-29).
-	// TODO(gri): Remove this when compilers have caught up.
-	i, j := 0, len(a)
-	for i < j {
-		h := i + (j-i)/2 // avoid overflow when computing h
-		// i ≤ h < j
-		if a[h] <= x {
-			i = h + 1
-		} else {
-			j = h
-		}
-	}
-	return i - 1
-}
diff --git a/vendor/gopkg.in/gcfg.v1/token/serialize.go b/vendor/gopkg.in/gcfg.v1/token/serialize.go
deleted file mode 100644
index 4adc8f9e..00000000
--- a/vendor/gopkg.in/gcfg.v1/token/serialize.go
+++ /dev/null
@@ -1,56 +0,0 @@
-// Copyright 2011 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package token
-
-type serializedFile struct {
-	// fields correspond 1:1 to fields with same (lower-case) name in File
-	Name  string
-	Base  int
-	Size  int
-	Lines []int
-	Infos []lineInfo
-}
-
-type serializedFileSet struct {
-	Base  int
-	Files []serializedFile
-}
-
-// Read calls decode to deserialize a file set into s; s must not be nil.
-func (s *FileSet) Read(decode func(interface{}) error) error {
-	var ss serializedFileSet
-	if err := decode(&ss); err != nil {
-		return err
-	}
-
-	s.mutex.Lock()
-	s.base = ss.Base
-	files := make([]*File, len(ss.Files))
-	for i := 0; i < len(ss.Files); i++ {
-		f := &ss.Files[i]
-		files[i] = &File{s, f.Name, f.Base, f.Size, f.Lines, f.Infos}
-	}
-	s.files = files
-	s.last = nil
-	s.mutex.Unlock()
-
-	return nil
-}
-
-// Write calls encode to serialize the file set s.
-func (s *FileSet) Write(encode func(interface{}) error) error {
-	var ss serializedFileSet
-
-	s.mutex.Lock()
-	ss.Base = s.base
-	files := make([]serializedFile, len(s.files))
-	for i, f := range s.files {
-		files[i] = serializedFile{f.name, f.base, f.size, f.lines, f.infos}
-	}
-	ss.Files = files
-	s.mutex.Unlock()
-
-	return encode(ss)
-}
diff --git a/vendor/gopkg.in/gcfg.v1/token/token.go b/vendor/gopkg.in/gcfg.v1/token/token.go
deleted file mode 100644
index b3c7c83f..00000000
--- a/vendor/gopkg.in/gcfg.v1/token/token.go
+++ /dev/null
@@ -1,83 +0,0 @@
-// Copyright 2009 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// Package token defines constants representing the lexical tokens of the gcfg
-// configuration syntax and basic operations on tokens (printing, predicates).
-//
-// Note that the API for the token package may change to accommodate new
-// features or implementation changes in gcfg.
-//
-package token
-
-import "strconv"
-
-// Token is the set of lexical tokens of the gcfg configuration syntax.
-type Token int
-
-// The list of tokens.
-const (
-	// Special tokens
-	ILLEGAL Token = iota
-	EOF
-	COMMENT
-
-	literal_beg
-	// Identifiers and basic type literals
-	// (these tokens stand for classes of literals)
-	IDENT  // section-name, variable-name
-	STRING // "subsection-name", variable value
-	literal_end
-
-	operator_beg
-	// Operators and delimiters
-	ASSIGN // =
-	LBRACK // [
-	RBRACK // ]
-	EOL    // \n
-	operator_end
-)
-
-var tokens = [...]string{
-	ILLEGAL: "ILLEGAL",
-
-	EOF:     "EOF",
-	COMMENT: "COMMENT",
-
-	IDENT:  "IDENT",
-	STRING: "STRING",
-
-	ASSIGN: "=",
-	LBRACK: "[",
-	RBRACK: "]",
-	EOL:    "\n",
-}
-
-// String returns the string corresponding to the token tok.
-// For operators and delimiters, the string is the actual token character
-// sequence (e.g., for the token ASSIGN, the string is "="). For all other
-// tokens the string corresponds to the token constant name (e.g. for the
-// token IDENT, the string is "IDENT").
-//
-func (tok Token) String() string {
-	s := ""
-	if 0 <= tok && tok < Token(len(tokens)) {
-		s = tokens[tok]
-	}
-	if s == "" {
-		s = "token(" + strconv.Itoa(int(tok)) + ")"
-	}
-	return s
-}
-
-// Predicates
-
-// IsLiteral returns true for tokens corresponding to identifiers
-// and basic type literals; it returns false otherwise.
-//
-func (tok Token) IsLiteral() bool { return literal_beg < tok && tok < literal_end }
-
-// IsOperator returns true for tokens corresponding to operators and
-// delimiters; it returns false otherwise.
-//
-func (tok Token) IsOperator() bool { return operator_beg < tok && tok < operator_end }
diff --git a/vendor/gopkg.in/gcfg.v1/types/bool.go b/vendor/gopkg.in/gcfg.v1/types/bool.go
deleted file mode 100644
index 8dcae0d8..00000000
--- a/vendor/gopkg.in/gcfg.v1/types/bool.go
+++ /dev/null
@@ -1,23 +0,0 @@
-package types
-
-// BoolValues defines the name and value mappings for ParseBool.
-var BoolValues = map[string]interface{}{
-	"true": true, "yes": true, "on": true, "1": true,
-	"false": false, "no": false, "off": false, "0": false,
-}
-
-var boolParser = func() *EnumParser {
-	ep := &EnumParser{}
-	ep.AddVals(BoolValues)
-	return ep
-}()
-
-// ParseBool parses bool values according to the definitions in BoolValues.
-// Parsing is case-insensitive.
-func ParseBool(s string) (bool, error) {
-	v, err := boolParser.Parse(s)
-	if err != nil {
-		return false, err
-	}
-	return v.(bool), nil
-}
diff --git a/vendor/gopkg.in/gcfg.v1/types/doc.go b/vendor/gopkg.in/gcfg.v1/types/doc.go
deleted file mode 100644
index 9f9c345f..00000000
--- a/vendor/gopkg.in/gcfg.v1/types/doc.go
+++ /dev/null
@@ -1,4 +0,0 @@
-// Package types defines helpers for type conversions.
-//
-// The API for this package is not finalized yet.
-package types
diff --git a/vendor/gopkg.in/gcfg.v1/types/enum.go b/vendor/gopkg.in/gcfg.v1/types/enum.go
deleted file mode 100644
index 1a0c7ef4..00000000
--- a/vendor/gopkg.in/gcfg.v1/types/enum.go
+++ /dev/null
@@ -1,44 +0,0 @@
-package types
-
-import (
-	"fmt"
-	"reflect"
-	"strings"
-)
-
-// EnumParser parses "enum" values; i.e. a predefined set of strings to
-// predefined values.
-type EnumParser struct {
-	Type      string // type name; if not set, use type of first value added
-	CaseMatch bool   // if true, matching of strings is case-sensitive
-	// PrefixMatch bool
-	vals map[string]interface{}
-}
-
-// AddVals adds strings and values to an EnumParser.
-func (ep *EnumParser) AddVals(vals map[string]interface{}) {
-	if ep.vals == nil {
-		ep.vals = make(map[string]interface{})
-	}
-	for k, v := range vals {
-		if ep.Type == "" {
-			ep.Type = reflect.TypeOf(v).Name()
-		}
-		if !ep.CaseMatch {
-			k = strings.ToLower(k)
-		}
-		ep.vals[k] = v
-	}
-}
-
-// Parse parses the string and returns the value or an error.
-func (ep EnumParser) Parse(s string) (interface{}, error) {
-	if !ep.CaseMatch {
-		s = strings.ToLower(s)
-	}
-	v, ok := ep.vals[s]
-	if !ok {
-		return false, fmt.Errorf("failed to parse %s %#q", ep.Type, s)
-	}
-	return v, nil
-}
diff --git a/vendor/gopkg.in/gcfg.v1/types/int.go b/vendor/gopkg.in/gcfg.v1/types/int.go
deleted file mode 100644
index af7e75c1..00000000
--- a/vendor/gopkg.in/gcfg.v1/types/int.go
+++ /dev/null
@@ -1,86 +0,0 @@
-package types
-
-import (
-	"fmt"
-	"strings"
-)
-
-// An IntMode is a mode for parsing integer values, representing a set of
-// accepted bases.
-type IntMode uint8
-
-// IntMode values for ParseInt; can be combined using binary or.
-const (
-	Dec IntMode = 1 << iota
-	Hex
-	Oct
-)
-
-// String returns a string representation of IntMode; e.g. `IntMode(Dec|Hex)`.
-func (m IntMode) String() string {
-	var modes []string
-	if m&Dec != 0 {
-		modes = append(modes, "Dec")
-	}
-	if m&Hex != 0 {
-		modes = append(modes, "Hex")
-	}
-	if m&Oct != 0 {
-		modes = append(modes, "Oct")
-	}
-	return "IntMode(" + strings.Join(modes, "|") + ")"
-}
-
-var errIntAmbig = fmt.Errorf("ambiguous integer value; must include '0' prefix")
-
-func prefix0(val string) bool {
-	return strings.HasPrefix(val, "0") || strings.HasPrefix(val, "-0")
-}
-
-func prefix0x(val string) bool {
-	return strings.HasPrefix(val, "0x") || strings.HasPrefix(val, "-0x")
-}
-
-// ParseInt parses val using mode into intptr, which must be a pointer to an
-// integer kind type. Non-decimal value require prefix `0` or `0x` in the cases
-// when mode permits ambiguity of base; otherwise the prefix can be omitted.
-func ParseInt(intptr interface{}, val string, mode IntMode) error {
-	val = strings.TrimSpace(val)
-	verb := byte(0)
-	switch mode {
-	case Dec:
-		verb = 'd'
-	case Dec + Hex:
-		if prefix0x(val) {
-			verb = 'v'
-		} else {
-			verb = 'd'
-		}
-	case Dec + Oct:
-		if prefix0(val) && !prefix0x(val) {
-			verb = 'v'
-		} else {
-			verb = 'd'
-		}
-	case Dec + Hex + Oct:
-		verb = 'v'
-	case Hex:
-		if prefix0x(val) {
-			verb = 'v'
-		} else {
-			verb = 'x'
-		}
-	case Oct:
-		verb = 'o'
-	case Hex + Oct:
-		if prefix0(val) {
-			verb = 'v'
-		} else {
-			return errIntAmbig
-		}
-	}
-	if verb == 0 {
-		panic("unsupported mode")
-	}
-	return ScanFully(intptr, val, verb)
-}
diff --git a/vendor/gopkg.in/gcfg.v1/types/scan.go b/vendor/gopkg.in/gcfg.v1/types/scan.go
deleted file mode 100644
index db2f6ed3..00000000
--- a/vendor/gopkg.in/gcfg.v1/types/scan.go
+++ /dev/null
@@ -1,23 +0,0 @@
-package types
-
-import (
-	"fmt"
-	"io"
-	"reflect"
-)
-
-// ScanFully uses fmt.Sscanf with verb to fully scan val into ptr.
-func ScanFully(ptr interface{}, val string, verb byte) error {
-	t := reflect.ValueOf(ptr).Elem().Type()
-	// attempt to read extra bytes to make sure the value is consumed
-	var b []byte
-	n, err := fmt.Sscanf(val, "%"+string(verb)+"%s", ptr, &b)
-	switch {
-	case n < 1 || n == 1 && err != io.EOF:
-		return fmt.Errorf("failed to parse %q as %v: %v", val, t, err)
-	case n > 1:
-		return fmt.Errorf("failed to parse %q as %v: extra characters %q", val, t, string(b))
-	}
-	// n == 1 && err == io.EOF
-	return nil
-}