Xwayland 23.1

Merged Olivier Fourdan requested to merge ofourdan/xserver:test-xwayland-23.1 into xwayland-23.1

This is preparation work for Xwayland 23.1.

Basically, redoing the work which was done by Michel @daenzer for the first standlone release (hence the cherry-picks that apply).

See also: #1426 (closed)

Edited by Olivier Fourdan

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