Author: sam marshall
MDL-42084 Core: Create new static class for use instead of set_time_limit
http://git.moodle.org/gw?p=moodle.git;a=commit;h=366b19a9549fb702064794dbc713479feb352ac8
http://github.com/moodle/moodle/commit/366b19a9549fb702064794dbc713479feb352ac8
+ 2.7 en [maxtimelimit,core_admin]
+ 2.7 en [maxtimelimit_desc,core_admin]