package/x11r7/xserver_xorg-server: bump version to 1.20.0

Rebased patch 0001 after upstream commit:
https://cgit.freedesktop.org/xorg/xserver/commit/configure.ac?id=e0748b10a8621066b404d713a76826907da777b9

Removed patch 0004, applied upstream:
https://cgit.freedesktop.org/xorg/xserver/commit/glx/glxscreens.c?id=d16133e3e293fe16b291114d344fbd5a61d5ed65

Added legacy handling for internal version option.

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
8 files changed