Author: Luca Bösch
MDL-54693 quiz: Info for attempts allowed in user and group override.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=b4fcf278c2bdf7149713bb517a019ecc31ac8723
http://github.com/moodle/moodle/commit/b4fcf278c2bdf7149713bb517a019ecc31ac8723
+ 3.5 en [attempts_help,mod_quiz]