sysutils/consolekit2: Switch to my fork.

My fork incorporates optional X11 support from files/, Val Packett's patches
for Wayland and my own fixes for systemd login1 compatibility required for
the newest sysutils/accountsservice.

Sponsored by: Serenity Cybersecurity, LLC

(cherry picked from commit 503c15c3e1a5416017d83d66768e06b91f07f630)