Lua 5.2 upgrade [1] for NSE.

[1] http://seclists.org/nmap-dev/2012/q2/34

nselib/socks.lua

@@ -4,7 +4,11 @@
 -- @author "Patrik Karlsson <patrik@cqure.net>"
 --
 
-module(... or "socks", package.seeall)
+local bin = require "bin"
+local nmap = require "nmap"
+local stdnse = require "stdnse"
+local string = require "string"
+_ENV = stdnse.module("socks", stdnse.seeall)
 
 -- SOCKS Authentication methods
 AuthMethod = {
@@ -350,4 +354,6 @@ Helper = {
 		return self.socket:close()
 	end,
 	
-}
+}
+
+return _ENV;