Author: Petr Skoda
MDL-30625 full support for main admin
http://git.moodle.org/gw?p=moodle.git;a=commit;h=db48cf080da8384b916c5261eccaeb7c048a03b8
http://github.com/moodle/moodle/commit/db48cf080da8384b916c5261eccaeb7c048a03b8
+ 2.2 en [mainadmin,core_role]
+ 2.2 en [mainadminset,core_role]