Author: Sam Hemelryk
MDL-42299 course: management category expansion improvements
http://git.moodle.org/gw?p=moodle.git;a=commit;h=df460b5a23ad285f8948529c541b0e6cc5fb8924
http://github.com/moodle/moodle/commit/df460b5a23ad285f8948529c541b0e6cc5fb8924
+ 2.6 en [cachedef_userselections,core_cache]