Author: Tony Butler
MDL-43770 mod_choice: Add option to include inactive users' responses
http://git.moodle.org/gw?p=moodle.git;a=commit;h=799770cbd71f9d399ff6e41263ab0b9588fc50f6
http://github.com/moodle/moodle/commit/799770cbd71f9d399ff6e41263ab0b9588fc50f6
+ 2.9 en [includeinactive,mod_choice]