Author: Stephen Bourget
MDL-55157 mod_feedback: Course reset should update dates
http://git.moodle.org/gw?p=moodle.git;a=commit;h=887eb290ba9abb8f37a47d9bbe5c78a73b54cfe8
http://github.com/moodle/moodle/commit/887eb290ba9abb8f37a47d9bbe5c78a73b54cfe8
+ 3.1 en [calendarend,mod_feedback]
+ 3.1 en [calendarstart,mod_feedback]