merge xorg-serer 21.1.3.

merge xorg-server 1.20.3.

first merge of netbsd changes. not tested yet.

merge cornflakes with xorg-server 1.10.3

merge xorg-server 1.9.2.

By default, use the old X server background and cursor mode (option
"-retro"). Add a "-noretro" option to get the new (black background
and no cursor) behavior.

Addresses part of PR xsrc/41870

initial import of xorg-server-1.6.1.901

initial import of xorg-server-1.4.2