Author: Simey Lameze
MDL-63196 calendar: add missing option to export category events
http://git.moodle.org/gw?p=moodle.git;a=commit;h=5863a07a4672c8a19ce977bf1d4b622539cab827
http://github.com/moodle/moodle/commit/5863a07a4672c8a19ce977bf1d4b622539cab827
+ 3.6 en [eventsrelatedtocategories,core_calendar]