Author: Damien Bezborodov
MDL-45678 assignsubmission_comments: Improve performance for permissions checking
http://git.moodle.org/gw?p=moodle.git;a=commit;h=4ee23c10bb365bd23ba26464268230a86e8d0700
http://github.com/moodle/moodle/commit/4ee23c10bb365bd23ba26464268230a86e8d0700
+ 2.6 en [cachedef_get_suspended_userids,core_cache]