Add ConsoleKit2 support for launching Wayland sessions
Review Request #130163 - Created June 19, 2017 and discarded
ConsoleKit2 as of version 1.1.1 implements the Session Controller dbus calls required by Kwin to run under Wayland. This patch first looks for the login1 service before attempting the ConsoleKit service.
On a system running ConsoleKit2, logging into a text console and running:export $(dbus-launch); export QT_QPA_PLATFORM=wayland; startplasmacompositor
Most of this patch is just shuffling code around to support both logind and CK2.