Updated Gateway config (channel rules) (markdown)

Gateway-config-(channel-rules).md

@@ -2,22 +2,28 @@
 :warning: Needs to be lowercase
 Below you can find how the channels (protocolchannel, and protocol2channel) should be filled in
 ```
-* irc        - #channel (# is required) 
+* irc        - #channel (# is required) (this needs to be lowercase!)
 * slack      - channel (without the #)
+             - ID:C123456 (where C123456 is the channel ID) does not work with webhook
 * discord    - channel (without the #)
+             - ID:123456789 (where 123456789 is the channel ID)
 * mattermost - channel (the channel name as seen in the URL, not the displayname)
                https://yourmattermostserver/yourteam/channels/yourchannel <- yourchannel
 * gitter     - username/room (as seen in the gitter.im url)
 * xmpp       - channel
 * telegram   - chatid (a large negative number, eg -123456789)
-  see (https://www.linkedin.com/pulse/telegram-bots-beginners-marco-frau)
+               see (https://www.linkedin.com/pulse/telegram-bots-beginners-marco-frau)
 * hipchat    - id_channel (see https://www.hipchat.com/account/xmpp for the correct channel)
 * rocketchat - #channel (# is required (also needed for private channels!)
 * matrix     - #channel:server (eg #yourchannel:matrix.org)
                encrypted rooms are not supported in matrix
 * steam      - chatid (a large number).
                The number in the URL when you click "enter chat room" in the browser
-* zulip      - stream (without the #)
+* whatsapp   - 48111222333-123455678999@g.us A unique group JID;
+               if you specify an empty string bridge will list all the possibilities
+             - "Group Name" if you specify a group name the bridge will hint its JID to specify as group 
+               names might change in time and contain weird emoticons
+* zulip      - stream/topic:mytopic (without the #)
 ```
 
 ### Discord