drivers with this, wip/pixman must be buildlinked in. Also, this server
requires xf86-input-keyboard-1.2.2 (just bump the version in pkgsrc),
renderproto 0.9.3, and the newer version of xf86dgaproto/libXxf86dga.
There may be other dependency updates I forgot to mention here.
Also, I included a patch from debian which allows you to specify
an XKBPATH environment variable at runtime, if that's useful to anyone.
Tested on NetBSD/amd64.
3b40ed5360