Is there a serverside socket library?

[FakeTruth]

MCServer uses Lua 5.1.4 unmodified. Maybe we should update to 5.2

I think I'm gonna install this http://w3.impa.br/~diego/software/luasocket/home.html instead of writing our own socket library for Lua. It seems to only have blocking sockets though, so this might not be optimal.. hmm