Fix pam-foreground-compat install

The pam-foreground-compat.ck script should be installed without
requring udev.
Revert "Fix crash on logout/login via SunRay"

This reverts commit 417e387750920b9e092705863a863e71a77ea431.

Causes a regression with polkit authorizations. See:
https://github.com/ConsoleKit2/ConsoleKit2/issues/16
https://github.com/ConsoleKit2/ConsoleKit2/issues/12
Additional fixes for 'GLib-CRITICAL: Source ID was not found when attempting to remove it' messages