luasocket release history pushed to github, and zero-length udp send bug fixed

[Sam Roberts <vieuxtech@...>]

Hi,

There doesn't seem to be a git repo of luasocket's releases, so I
pushed them in order to

https://github.com/sam-github/luasocket

This might be useful to anybody else patching luasocket.

I also applied a patch for a bug I reported last year:

http://lua-users.org/lists/lua-l/2010-02/msg00751.html

see branch:

https://github.com/sam-github/luasocket/tree/udp_zero_payload_send

I'll push fixes to a few other bugs I've found as I find time.

Cheers,
Sam