Add information about the work in progress to bring in the X packages
(server, client, libraries) from freedesktop.org.

Once the website has next been updated, please feel free to post the
following URL in response to the questions about it:

http://www.freebsd.org/doc/en_US.ISO8859-1/books/faq/x.html#WHICH-X

Discussed on: freebsd-doc, freebsd-x11