Log Message:
xf86-video-ati: update to 19.0.0.

I'm pleased to announce the 19.0.0 release of xf86-video-ati, the Xorg
driver for ATI/AMD Radeon GPUs supported by the radeon kernel driver.
This release supports xserver versions 1.13-1.20.

Highlights:

* Various TearFree related fixes and robustness improvements.
* Up to six independent instances per GPU are now supported in "Zaphod"
  style multi-head configurations.

Plus other improvements and fixes. Thanks to everybody who contributed
to this release in any way!

Alan Coopersmith (1):
      Update README for gitlab migration

Mario Kleiner (1):
      Fix crash when page flipping in multi-X-Screen/Zaphod mode

Michel Dänzer (30):
      dri3: Handle radeon_get_pixmap_bo returning NULL
      Handle pending scanout update in drmmode_crtc_scanout_free
      Make wait_pending_flip / handle_deferred symmetric in set_mode_major
      Allow up to six instances in Zaphod mode
      Post-release version bump
      Detect and fix up non-premultiplied cursor data
      Skip gamma correction of cursor data if premultiplied R/G/B > alpha
      glamor: Can work at depth >= 15 with current xserver Git master
      Use drm_abort_one in drm_queue_handler
      Explicitly keep track of whether a DRM event is for a flip or not
      Move deferred vblank events to separate drm_vblank_deferred list
      Perform scanout buffer update immediately if drmmode_wait_vblank fails
      Cancel pending scanout update in drmmode_crtc_scanout_update
      Automatically try re-enabling TearFree after a flip failed
      Drop RADEONInfoRec::cursor_bo array
      Use drmIoctl in drmmode_show_cursor
      Update cursor position in drmmode_show_cursor if hotspot changed
      Use two HW cursor buffers per CRTC
      Only call drmmode_uevent_init if RandR is enabled
      Only call drmmode_validate_leases if RandR is enabled
      dri3: Flush if necessary in dri3_fd_from_pixmap
      dri2: Flush in dri2_create_buffer2 after calling glamor_set_pixmap_bo
      glamor: Avoid glamor_create_pixmap for pixmaps backing windows
      Don't allow TearFree scanout flips to complete in the same vblank period
      Only update drmmode_crtc->flip_pending after actually submitting a flip
      Call drmHandleEvent again if it was interrupted by a signal
      Keep waiting for a pending flip if drm_handle_event returns 0
      present: Check that flip and screen pixmap pitches match
      dri2: Call drm_queue_handle_deferred in dri2_deferred_event
      Bump version for 19.0.0 release