Author: Simey Lameze
MDL-63196 calendar: add missing option to export category events
http://git.moodle.org/gw?p=moodle.git;a=commit;h=4c0ea3f45ec297ddb22e60dff3a8436453598a16
http://github.com/moodle/moodle/commit/4c0ea3f45ec297ddb22e60dff3a8436453598a16
+ 3.5 en [eventsrelatedtocategories,core_calendar]