Add support for edited messages (mattermost)

matterbridge.toml.sample

@@ -241,6 +241,14 @@ NicksPerRow=4
 #OPTIONAL (default false)
 PrefixMessagesWithNick=false
 
+#Disable sending of edits to other bridges
+#OPTIONAL (default false)
+EditDisable=false
+
+#Message to be appended to every edited message
+#OPTIONAL (default empty)
+EditSuffix=" (edited)"
+
 #Nicks you want to ignore. 
 #Messages from those users will not be sent to other bridges.
 #OPTIONAL