Author: Vincent Schneider
MDL-84706 bigbluebuttonbn: improved authorization and mitigate CSRF risks
http://git.moodle.org/gw?p=moodle.git;a=commit;h=00bef0f91da8fe227ca4b2efe6eadf179dd7eba8
http://github.com/moodle/moodle/commit/00bef0f91da8fe227ca4b2efe6eadf179dd7eba8
+ 4.1 en [recordingnotfound,mod_bigbluebuttonbn]