50.beta
=======

* Add support for "unified" authentication mechanism. Histrionically, each
  authentication method went through its own PAM conversation. Now, we also
  support running a single PAM conversation that runs multiple authentication
  methods at once. This requires support from PAM modules like pam_sss
* Introduce debugging for JSON PAM messages via $GDM_DEBUG_JSON_REQUESTS env var
* Re-introduce a timeout while waiting for primary GPU to appear. There are edge
  cases where there is a GPU (and thus Wayland will work) but none is labeled as
  primary. Once the timeout expires we stop waiting for the primary GPU and just
  launch the session on any available GPU.
* Authentication failures caused by PAM services reporting themselves as
  unavailable are no longer reported as failed authentication attempts. For
  instance, fingerprint sensor timeouts are reported as a service unavailable
  error, and we would previously log that as a failed authentication attempt.
* "Service Unavailable" errors from PAM modules are no longer treated as failed
  login attempts. Most notably, such errors are returned by fprintd whenever the
  fingerprint sensor times out.
* GDM now tries to shut down the session whenever the PAM worker process crashes
* Partially un-merged the session and display registration steps that were merged
  in 50.alpha, due to bugs that the change introduced
* Misc. other bug fixes
* Translation updates