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+# Breaking changes from 0.4 to 0.5 for matterbridge (webhooks version)
+## IRC section
+### Server
+Port removed, added to server
+```
+server="irc.freenode.net"
+port=6667
+```
+changed to
+```
+server="irc.freenode.net:6667"
+```
+### Channel
+Removed see Channels section below
+
+### UseSlackCircumfix=true
+Removed, can be done by using ```RemoteNickFormat="<{NICK}> "```
+
+## Mattermost section
+### BindAddress
+Port removed, added to BindAddress
+
+```
+BindAddress="0.0.0.0"
+port=9999
+```
+
+changed to
+
+```
+BindAddress="0.0.0.0:9999"
+```
+
+### Token
+Removed
+
+## Channels section
+```
+[Token "outgoingwebhooktoken1"] 
+IRCChannel="#off-topic"
+MMChannel="off-topic"
+```
+
+changed to
+
+```
+[Channel "channelnameofchoice"] 
+IRC="#off-topic"
+Mattermost="off-topic"
+```