[gdm] (20 commits) Non-fast-forward update to branch wip/rancell/guest

[Robert Ancell <rancell src gnome org>]

The branch 'wip/rancell/guest' 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:

  cd6b8e2... Add guest support

Commits added to the branch:

  3dd981c... Update Indonesian translation (*)
  c89150d... Update Arabic translation (*)
  d31c235... NEWS: update for release (*)
  87c5edd... configure: bump to 3.27.3 (*)
  e9e60e2... Replace deprecated GSimpleAsyncResult with GTask (*)
  04bed0a... Update Friulian translation (*)
  b084c3d... Updated Spanish translation (*)
  8860b5f... Update Turkish translation (*)
  84b921c... Update Swedish translation (*)
  932ba7a... Update German translation (*)
  5dd7f5d... Updated Czech translation (*)
  bcd60d7... Updated Slovenian translation (*)
  5dd631c... common: don't run scripts with bogus DISPLAY and XAUTHORITY (*)
  bf0a664... common: Also set GROUP in scripts (*)
  250dd69... pam_gdm: bail if more than one password (*)
  5ae4d17... NEWS: update for release (*)
  d903a4a... configure.ac: bump to 3.27.4 (*)
  a007261... Update Finnish translation (*)
  e7fdf18... Remove unused variables (*)
  85090fc... Add guest support

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