x11/xset: Update to 1.2.6
Add WWW.
Update CONFIGURE_ARGS and pkg-descr.
XFree86-Misc support was disabled by default in 1.2.5, and libXxf86misc
has been removed from the ports.
https://lists.x.org/archives/xorg-announce/2026-July/003721.html
PR: 296674
Approved by: x11 (arrowd)
Approved by: osa (mentor)