Author: Rajesh Taneja
MDL-40058 Events: Replaced add_to_log for page comments to event
http://git.moodle.org/gw?p=moodle.git;a=commit;h=86b0e3b308457908675ac761a571e80a96a9f977
http://github.com/moodle/moodle/commit/86b0e3b308457908675ac761a571e80a96a9f977
+ 2.7 en [eventcommentcreated,core]
+ 2.7 en [eventcommentdeleted,core]
+ 2.7 en [eventcommentsviewed,core]