add support for logind suspend [patch]
This patch adds support for logind over D-Bus. Logind sends out signals when a machine is about to enter suspend. It replaces older upower singals.
However, in Fedora 18, both systems still co-exist. Upower signals get emitted when the user suspends the machine using the system menu, and logind signals get emitted when he closes the lid or uses the keyboard shortcut. For that reason upower support should not be removed, but logind support should be added.
Please review the attached patch. It seems to be working perfectly for me on Fedora 18.