Author: Shamiso.Jaravaza
MDL-76303 mod_bigbluebuttonbn: Fix userlimit
http://git.moodle.org/gw?p=moodle.git;a=commit;h=f19e245f2942417c185b3a21857117dbbac62dcb
http://github.com/moodle/moodle/commit/f19e245f2942417c185b3a21857117dbbac62dcb
+ 4.0 en [view_message_conference_user_limit_reached,mod_bigbluebuttonbn]