Author: Andrew Davis
rating MDL-23908 altered the way the role hints for ratings work
http://git.moodle.org/gw?p=moodle.git;a=commit;h=bbf277335ea9e72023bb8c28e2af35db88d45391
http://github.com/moodle/moodle/commit/bbf277335ea9e72023bb8c28e2af35db88d45391
+ 2.0 en [canrate,core_rating]
+ 2.0 en [rolewarning,core_rating]
+ 2.0 en [rolewarning_help,core_rating]