xserver-xorg: update to 1.20.9

xserver-xorg: update to 1.20.9

Remove CVE patches contained in this release.

Stable branch update:

afb77415e (tag: xorg-server-1.20.9) xserver 1.20.9
705d72139 Fix XRecordRegisterClients() Integer underflow
5b384e767 Fix XkbSelectEvents() integer underflow
eff3f6cdd Fix XIChangeHierarchy() integer underflow
1d3a1092c Correct bounds checking in XkbSetNames()
249a12c54 linux: Fix platform device probe for DT-based PCI
5c96eb5f4 linux: Fix platform device PCI detection for complex bus topologies
74b7427c4 linux: Make platform device probe less fragile
4979ac8f0 fix for ZDI-11426
2720b8715 xfree86: add drm modes on non-GTF panels
7da8e7bab present: Check valid region in window mode flips
4a65b6617 xwayland: Handle NULL xwl_seat in xwl_seat_can_emulate_pointer_warp
10cabe0b9 xwayland: Propagate damage x1/y1 coordinates in xwl_present_flip
3b51978b9 doc: Update URLs in Xserver-DTrace.xml
6cbd6a09b xwayland: Use a fixed DPI value for core protocol
d4e8c4622 xwayland: only use linux-dmabuf if format/modifier was advertised
c726ceacc hw/xfree86: Avoid cursor use after free
0679d4660 Update URL's in man pages
3059a2e62 xwayland: Disable the MIT-SCREEN-SAVER extension when rootless
23c55ec32 xwayland: Hold a pixmap reference in struct xwl_present_event
1179938c1 randr: Check rrPrivKey in RRHasScanoutPixmap()
4912f693e modesetting: Fix front_bo leak at drmmode_xf86crtc_resize on XRandR rotation
ccbcf083d xwayland: Store xwl_tablet_pad in its own private key
cc3613559 xwayland: Initialise values in xwlVidModeGetGamma()
533cc6ca0 xwayland: Fix crashes when there is no pointer
3aa31823d xwayland: Clear private on device removal
22c0808ac xwayland: Free all remaining events in xwl_present_cleanup
37779d7f4 xwayland: Always use xwl_present_free_event for freeing Present events
ba52e5eb0 present/wnmd: Free flip_queue entries in present_wnmd_clear_window_flip
b3310ed50 present/wnmd: Keep pixmap pointer in present_wnmd_clear_window_flip
fc297c87d xwayland: import DMA-BUFs with GBM_BO_USE_RENDERING only
0430d13c1 xwayland: Fix infinite loop at startup
b8b10e293 modesetting: Disable pageflipping when using a swcursor
271934db9 dix: do not send focus event when grab actually does not change

Signed-off-by: Steve Sakoman <steve@sakoman.com>