[gdm] (20 commits) Created branch multi-stack

[Ray Strode <halfline src gnome org>]

The branch 'multi-stack' was created.

Summary of new commits:

  20991d6... Revert "Don't wait a mandatory 2 seconds when resetting gre
  9c40094... Add new api to ask when chooser widget is done loading item
  88f4bde... Introduce new Conversation object
  9fc55e0... Rename session worker to the service it's managing
  e225e66... Make greeter/autologin session explicitly request PAM conve
  04d5f55... Store multiple conversations in the session
  e26a7df... Don't delay login for passwd -d users
  c6f6fb2... Emit "service-unavailable" from session when pam service re
  0c11fba... Bubble service-unavailable up to greeter
  d819fa6... Catch service-unavailable from server in client and propaga
  aa349c3... Add a plugin based extension system to greeter
  597b1de... Add fingerprint plugin
  fc98f45... Add smartcard plugin
  d1fa8b9... KILL stuck processes if they don't die on TERM
  459d990... switch to proper mode when going to timed login
  4faa577... Drop "Cancelling" message for plugin initiated cancels
  be4e406... Add delay when showing messages (needs split)
  4304e15... Drop cancelling message
  4c168d8... manage tasks outside of task list
  df1bfdc... smartcard: don't show extension if disabled in authconfig