Author: Stephen Bourget
MDL-55140 mod_choice: Allow independent open and close dates
http://git.moodle.org/gw?p=moodle.git;a=commit;h=2ff504c6b2e350fed4fd9052d52c15455e1ea8f2
http://github.com/moodle/moodle/commit/2ff504c6b2e350fed4fd9052d52c15455e1ea8f2
+ 3.2 en [choiceclose,mod_choice]
+ 3.2 en [choiceopen,mod_choice]
- 3.2 en [timerestrict,mod_choice]