Author: Adrian Greeve
MDL-43008 calendar: Allow calendar plugins to display setting pages.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=b404b1f41cb2ba1f3b4515dca1ef85f857a1d315
http://github.com/moodle/moodle/commit/b404b1f41cb2ba1f3b4515dca1ef85f857a1d315
+ 2.7 en [calendartypes,core_calendar]