Author: Simey Lameze
MDL-63196 calendar: add missing option to export category events
http://git.moodle.org/gw?p=moodle.git;a=commit;h=f19f6cceaf24d229426495e23b56c34ec36898ea
http://github.com/moodle/moodle/commit/f19f6cceaf24d229426495e23b56c34ec36898ea
+ 3.7 en [eventsrelatedtocategories,core_calendar]