Lua 5.2 upgrade [1] for NSE.

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

nselib/redis.lua

@@ -2,10 +2,11 @@
 --
 -- @author "Patrik Karlsson <patrik@cqure.net>"
 
-module(... or "redis", package.seeall)
-
-local match = require 'match'		
-
+local match = require "match"
+local nmap = require "nmap"
+local stdnse = require "stdnse"
+local table = require "table"
+_ENV = stdnse.module("redis", stdnse.seeall)
 
 Request = {
 
@@ -140,4 +141,6 @@ Helper = {
 		return self.socket:close()
 	end
 	
-}
+}
+
+return _ENV;