[gdm] (4 commits) Non-fast-forward update to branch wip/benzea/systemd-user

[Benjamin Berg <bberg src gnome org>]

The branch 'wip/benzea/systemd-user' 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:

  854101e... manager: Find user's current graphical session, not session

Commits added to the branch:

  0b4e2d8... data: Adjust to g-s-d plugin removals (*)
  9e9df48... data: Drop gsd-xsettings from required plugins (*)
  f530533... Merge branch 'wip/carlosg/update-gsd-plugins' into 'master' (*)
  fcba1e1... manager: Find user's current graphical session, not session

(*) This commit already existed in another branch; no separate mail sent