[reSIProcate] status of stun client support

[Bruce Lowekamp]

>From what I can tell, it looks like stun server support has been
integrated into UdpTransport, but there is currently nothing in head
to use a stun server as a client (although there is a comment in the
mailing list about modifying UdpTransport to do that).  Is my reading
correct?  Has anyone written this code and checked it in anywhere, or
should I just go ahead and hack the support into UdpTransport?

Thanks,
Bruce