[JDEV] groupchat support

[Jerome Banks]

  Hi, 
     Some questions about the "groupchat" message type...

   First, is "groupchat" supported by the JabberIM client, 
    developed by jabber.com ??? I don't see how to use it.

   What clients do support it ???

   Do all servers support "groupchat" or is it a special feature,
    which has to be enabled ???

   How do you add or remove groups ???
   How do you allow or disallow people from joining a group ???

  tia
   --- jerome