feedback is now sent to users with receive_feedback permission
regardless of the contents of the feedbackRecipients list in
global.conf. Comments in global.conf now read:
By default, feeback is sent to all users who have permission to
receive_feedback. If this list is non-empty, feedback is also sent to
the addresses specified here.
* If you want to disable feedback altogether, leave this empty and set
submit_feeback => $nobody in %permissionLevels below. This will
cause the feedback button to go away as well.
* If you want to send email ONLY to addresses in this list, set
receive_feedback => $nodoy in %permissionLevels below.
It's often useful to set this in the course.conf to change the
behavior of feedback for a specific course.