util.*: Remove use of module() function, make all module functions local and return them in a table at the end

author: Kim Alvefur <zash@zash.se>
date: Sat, 21 Feb 2015 10:36:37 +0100
parent: 4952:0e9a5b63206a
child: 7988:dc758422d896
--- a/util/throttle.lua	Mon Aug 10 22:16:05 2015 +0200
+++ b/util/throttle.lua	Sat Feb 21 10:36:37 2015 +0100
@@ -3,7 +3,7 @@
 local setmetatable = setmetatable;
 local floor = math.floor;
 
-module "throttle"
+local _ENV = nil;
 
 local throttle = {};
 local throttle_mt = { __index = throttle };
@@ -39,8 +39,10 @@
 	end
 end
 
-function create(max, period)
+local function create(max, period)
 	return setmetatable({ rate = max / period, max = max, t = 0, balance = max }, throttle_mt);
 end
 
-return _M;
+return {
+	create = create;
+};