Author: Shamim Rezaie
MDL-69004 core: Encourage admins to enable user feedback
As part of this commit, the default for the user feedback feature
has changed to disable.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=06bbbbff2764cd2fb782ed55611a9556e1503e43
http://github.com/moodle/moodle/commit/06bbbbff2764cd2fb782ed55611a9556e1503e43
+ 3.9 en [enableuserfeedback_desc,core_admin]
+ 3.9 en [userfeedbackencouragement,core_admin]