xorg-server (1.20) does not compile when UDEV is enabled/available (missing system header file)

xorg-server (1.20) does not compile due to a missing system header file from glibc (sys/sysmacros.h) when configured with --enable-config-udev (default: auto).

Please see the proposed attached patch.

xorg-server-1.20.4-include-sysmacros-in-udev.patch

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xorg-server (1.20) does not compile when UDEV is enabled/available (missing system header file)