xorg-server-21.1.15-1

[Jon Turney]

The following packages have been uploaded to the Cygwin distribution:

* xorg-server-21.1.15-1
* xorg-server-common-21.1.15-1
* xorg-server-debuginfo-21.1.15-1
* xorg-server-devel-21.1.15-1
* xorg-server-extra-21.1.15-1
* xorg-server-xorg-21.1.15-1
* xwinclip-21.1.15-1

These packages contain XWin and the other X.Org X11 servers.

There are no cygwin-specific changes in addition to the upstream fixes 
[1][2][3] since 21.1.12-1.

[1] https://lists.x.org/archives/xorg-announce/2024-April/003504.html
[2] https://lists.x.org/archives/xorg-announce/2024-October/003546.html
[3] https://lists.x.org/archives/xorg-announce/2024-December/003576.html