Add xdr support

[Christopher Faylor]

On Tue, Mar 02, 2010 at 07:09:21PM +0100, Corinna Vinschen wrote:
>The patch is missing the related changes to cygwin/posix.sgml and
>doc/new-features.sgml.

#(*& I HAVE to get out a new version of cygwin-doc!  I'll try to do
that this week.

After Chuck has updated the documentation, of course.

Ah, right!  That's it!  I was waiting for Chuck.  That's why there
has been no update for six months.

cgf