Log Message:
Update to mu-conference v0.8

>From the changelog:
v0.8
    * Optimization: A bunch of patches by M. Doliner 
                (see svn log for more details)
    * Feature: Allow the service admin to see the occupants of every
		rooms
    * Feature: Allow the service admin to enter a room with nicknames
		locked even if his nickname isn't the one needed
    * Feature: option to disable room logging on the whole component
    * Feature: option to save room log files in subdirectories according
		to date
    * Bugfix: Two vulnerabilities in mysql module
    * Bugfix: send code=110 when needed according to XEP-0045
    * Bugfix: Fix crash when changing roles (M. Doliner) 
    * Bugfix: Fixed a bug when entering/leaving a room, it was
		considered as a nick change
    * Bugfix: Corrected the errors sent by mu-conference
    * Bugfix: Better error code when choosing a nick not conform with
		the room policy
    * Bugfix: Fixed a segfault in the decline messages handler
    * Bugfix: Minors memleak fixed by M. Doliner (#11300 and #10862)
    * Bugfix: Avoid a segfault when asking unique room name with a too 
                big user jid
    * Bugfix: going in an infinite loop if the user invite the jid ""
    * Bugfix: Changed error handling
      - Don't kick a user if the message error is not delivery-related,
        otherwise user could be kicked when refusing a file transfer for
	example
            - If the user is not kicked, don't discard the error, send
		it to the other user/chatroom
    * Bugfix: Hide XEP-0203 delay nodes when sending back presences
		stanzas (#12592, patch by Garrett Kuchta)
    * Bugfix: Fix a segfault with badly formed packets
    * Bugfix: Corrected a bug which allowed to have html in nickname in
		the logs (A. Verrier)