[mutter] (16 commits) Non-fast-forward update to branch wip/carlosg/drop-caps

[Carlos Garnacho <carlosg src gnome org>]

The branch 'wip/carlosg/drop-caps' 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:

  a335e2a... cogl: Defer EGLContext creation to a separate thread
  8bec944... core: Move unix signal handler later in the process
  0b52ce8... core: Set SCHED_RR by default on Wayland sessions
  c5f632d... core: Set up EGL context creation thread before dropping ca
  ffa1918... core: Drop all capabilities on initialization
  1a0e366... backends: Drop rt-scheduler configuration key
  beb31a5... backend/native: Use high priority contexts for secondary GP

Commits added to the branch:

  6944839... window-props: Read WM_TRANSIENT_FOR for override-redirect w (*)
  07ca100... cogl: glBlendEquationSeparate is always available (*)
  9cbf83d... cogl: glBlendFuncSeparate is always available (*)
  0545b93... plugins/default: Handle skipped animations (*)
  a4f51da... plugin-manager: Kill window effects on destroy (*)
  5afec87... input-settings/x11: Add missing clutter_x11_trap_x_errors a (*)
  7193938... compositor: Guard against untimely calls (*)
  03b59f9... clutter/actor: Move paint flag to ClutterActorNode (*)
  044238b... clutter/actor: Draw paint volumes using paint nodes (*)
  f294657... cogl: Defer EGLContext creation to a separate thread
  c470fb8... core: Move unix signal handler later in the process
  e5457f4... core: Set SCHED_RR by default on Wayland sessions
  5e87f83... core: Set up EGL context creation thread before dropping ca
  44b23cc... core: Drop all capabilities on initialization
  a795e6e... backends: Drop rt-scheduler configuration key
  d0dc849... backend/native: Use high priority contexts for secondary GP

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