[totem] (5 commits) Non-fast-forward update to branch wip/hadess/gproxy-resolver

[Bastien Nocera <hadess src gnome org>]

The branch 'wip/hadess/gproxy-resolver' 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:

  27ca44c... backend: Use GProxyResolver to fetch proxy information

Commits added to the branch:

  717c325... properties: Use GOnce to init GStreamer (*)
  725b9e9... gst: Add function to disable certain video decoders (*)
  2a381a7... thumbnailer: Use new totem_gst_disable_display_decoders() h (*)
  46ad3b0... properties: Fix possible crash when VA-API is installed (*)
  12aa8c7... backend: Use GProxyResolver to fetch proxy information

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