Support LuaSocket 2.0.x

[vschiavoni]

It would be super-useful to support LuaSocket API.
Internally, the calls could be translated to WebRTC or other natively-supported networking library.

[paulcuth]

That would be a really good idea. It shouldn't be built into the VM though, rather an add-on that can be passed into the VM when it's instantiated.

I'm currently working on adding JIT compiling to Moonshine, so I won't be able to look at this for a while. Meanwhile, if anyone else fancies a crack at it, I'd be happy to help all I can.