The fact that gksu does not support alternative means of authentication has nothing to do with this regression in sudo. Relevant bug for that issue is #86843. The solution is to use gksu-polkit, a successor to gksu, instead.
The fact that gksu does not support alternative means of authentication has nothing to do with this regression in sudo. Relevant bug for that issue is #86843. The solution is to use gksu-polkit, a successor to gksu, instead.