Author: Adrian Greeve
MDL-43008 calendar: Allow calendar plugins to display setting pages.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=55b02e02e62f180800ae81428f33afbf9aea8349
http://github.com/moodle/moodle/commit/55b02e02e62f180800ae81428f33afbf9aea8349
+ 2.6 en [calendartypes,core_calendar]