No UDP support in Uno.Net.Sockets

[ftKnox]

Looking through Uno.Net.Sockets it looks like there is no support for udp sockets?

[kusma]

Yeah, that's correct. Patches welcome! :-)

[mortend]

I started working on this last year, but never finished the implementation. I ended up doing my UDP stuff directly in foreign C++ instead.

Anyway, here's what I got so far: https://github.com/mortend/uno/commits/udp-client