Author: Frederic Massart
MDL-40055 mod_assign: Replace add_to_log 'unlock submission'
http://git.moodle.org/gw?p=moodle.git;a=commit;h=9a289c3da595bdbd48ab59f06007d88d542be630
http://github.com/moodle/moodle/commit/9a289c3da595bdbd48ab59f06007d88d542be630
+ 2.6 en [event_submission_unlocked,mod_assign]