Author: Rajesh Taneja
MDL-40058 mod_wiki: Replaced add_to_log for override locks with event
http://git.moodle.org/gw?p=moodle.git;a=commit;h=b3dd79d101b97d8fd60882077d2aef5c4386873c
http://github.com/moodle/moodle/commit/b3dd79d101b97d8fd60882077d2aef5c4386873c
+ 2.7 en [eventpagelocksdeleted,mod_wiki]