polkit authentication agent fails to be properly launched in kde
We launch polkit-kde-authentication-agent-1 from the daemonized helper, same as in gnome, but polkit does not recognizes the authentication agent (and tries to authenticate in console, which it fails).
(from redmine: created on 2013-09-05, relates #4028 (closed), relates #4218 (closed), relates #4144 (closed))