Author: Andrew Madden
MDL-67351 admin: Create new 'required' admin flag setting.
Extend the admin flag options, that currently allow the 'advanced' and 'locked' states
of a form setting to be controlled by a plugins admin settings, to also include
the 'required' state. These options appear as a list of checkboxes next to the admin
setting.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=948a951a4e98558c21e84d9926db62b07b39997a
http://github.com/moodle/moodle/commit/948a951a4e98558c21e84d9926db62b07b39997a
+ 3.9 en [required,core_admin]