[gdm] Non-fast-forward update to branch wip/fix-autologin-unlock-race

[Ray Strode <halfline src gnome org>]

The branch 'wip/fix-autologin-unlock-race' was changed in a way that was not a fast-forward update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 https://wiki.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  5a4ed06... session-worker: Don't switch back VTs until session is full

Commits added to the branch:

  dcdbaaa... session-worker: Don't switch back VTs until session is full