Add xdr support

[Dave Korn]

On 14/02/2010 10:18, Corinna Vinschen wrote:

> I don't know if that works, but it would be really cool if a single
> DLL import lib like libcygwin.a could export symbols from different
> DLLs.  That way we could create a cygxdr1.dll which contains the XDR
> functions, but which could be linked against by just the default linking
> against libcygwin.a.

  Why would we do that?

    cheers,
      DaveK