- Prevent client that do not have appropriate capabilities to create chat

rooms

• Reply 488 Not Acceptable Here if a client without groupchat capabilities tries to create a chatroom
• Do not send a SUBSCRIBE if the chatroom that has just been created has an handler in the remote conference list event handler
• Reply 403 Forbidden if a client successfully creates a chatroom but he/she is not allowed in
• Do not subscribe again to chatrooms when refreshing a register

Tester: Add devices information only if they have groupchat capabilities when registering a new ClientConference