[gnome-session] (13 commits) Non-fast-forward update to branch wip/flashback

[Alberts Muktupāvels <muktupavels src gnome org>]

The branch 'wip/flashback' 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:

  a3133bd... don't use org.gnome.Shell for end session dialog

Commits added to the branch:

  5d1b175... Updated Kazakh translation (*)
  50aa783... NEWS: update for release (*)
  383fdeb... configure: bump to 3.15.3 (*)
  e95bbf6... Updated Basque language (*)
  41d7c84... main: allow turning on debugging from environment variable (*)
  c3c3f2b... autostart: don't set DISPLAY in autostarted apps for waylan (*)
  2138d5d... main: support GNOME_SESSION_DEBUG=0 and GNOME_SESSION_DEBUG (*)
  297a423... Updated Brazilian Portuguese translation (*)
  322e753... Updated Russian translation (*)
  0befc01... Updated Indonesian translation (*)
  68b5097... Updated Slovenian translation (*)
  837a0bf... manager: add back session-name property (*)
  90c988d... don't use org.gnome.Shell for end session dialog

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