[gdm] (13 commits) Non-fast-forward update to branch wip/wayland-rebase

[Jasper St. Pierre <jstpierre src gnome org>]

The branch 'wip/wayland-rebase' 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:

  64b8e36... Revert "move over to using 'dconf compile' and file-db"
  b7e34cb... worker: move PAM tty/display setup to open session
  00ac0c9... daemon: move user session code from slave to main daemon
  8d1987c... Integrate the slaves into the main daemon process
  33ceba0... slave: add ability to reset launch environment
  21bb886... session: Prevent memory leaks by removing strdup accessors
  e18ad7b... manager: Reset our own greeter when in a Wayland session
  0de32aa... Add wayland-sessions
  333f379... own display server
  2cdb942... ff

Commits added to the branch:

  793f222... slave: Remove more dead properties (*)
  7c34b11... worker: Properly detect the error code from setting PAM_TTY (*)
  8fda79c... session: Prevent memory leaks by removing strdup accessors (*)
  0ac1718... display: Don't strdup unnecessarily (*)
  4973cb1... Revert "move over to using 'dconf compile' and file-db"
  f92aa15... worker: move PAM tty/display setup to open session
  1440ab3... daemon: move user session code from slave to main daemon
  6a27aee... Integrate the slaves into the main daemon process
  4567847... slave: add ability to reset launch environment
  efcb7cd... manager: Reset our own greeter when in a Wayland session
  f3de7ba... Add wayland-sessions
  7e2d0d0... own display server
  4333e7a... ff

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