Author: Mark Nelson
MDL-40912 coursecat: replaced 'update' add_to_log call with an event
http://git.moodle.org/gw?p=moodle.git;a=commit;h=c4cea8cb5dfbb4a583b3b5f621c75e27f67a587e
http://github.com/moodle/moodle/commit/c4cea8cb5dfbb4a583b3b5f621c75e27f67a587e
+ 2.7 en [eventcoursecategoryupdated,core]