Author: Sam Hemelryk
MDL-23532 enrol-manual - manual enrolments now manages its own enrolment editing and unenrolment
http://git.moodle.org/gw?p=moodle.git;a=commit;h=24a0c1ea66c384f6b10a8c198088d489098d105d
http://github.com/moodle/moodle/commit/24a0c1ea66c384f6b10a8c198088d489098d105d