Remove included Lua and LuaSocket source

Also rename README.txt to README.md and update it.

init.lua

@@ -0,0 +1,138 @@
+-- This file is licensed under the terms of the BSD 2-clause license.
+-- See LICENSE.txt for details.
+
+local modpath = minetest.get_modpath(minetest.get_current_modname())
+
+package.path =
+		package.path..";"
+		-- To find LuaIRC's init.lua
+		..modpath.."/?/init.lua;"
+		-- For LuaIRC to find its files
+		..modpath.."/?.lua"
+
+mt_irc = {
+	version = "0.2.0",
+	connected = false,
+	cur_time = 0,
+	message_buffer = {},
+	recent_message_count = 0,
+	joined_players = {},
+	modpath = modpath,
+	lib = require("irc"),
+}
+local irc = mt_irc.lib
+
+dofile(modpath.."/config.lua")
+dofile(modpath.."/messages.lua")
+dofile(modpath.."/hooks.lua")
+dofile(modpath.."/callback.lua")
+dofile(modpath.."/chatcmds.lua")
+dofile(modpath.."/botcmds.lua")
+dofile(modpath.."/util.lua")
+if mt_irc.config.enable_player_part then
+	dofile(modpath.."/player_part.lua")
+else
+	setmetatable(mt_irc.joined_players, {__index = function(index) return true end})
+end
+
+minetest.register_privilege("irc_admin", {
+	description = "Allow IRC administrative tasks to be performed.",
+	give_to_singleplayer = true
+})
+
+local stepnum = 0
+
+minetest.register_globalstep(function(dtime) return mt_irc:step(dtime) end)
+
+function mt_irc:step(dtime)
+	if stepnum == 3 then
+		if self.config.auto_connect then
+			self:connect()
+		end
+	end
+	stepnum = stepnum + 1
+
+	if not self.connected then return end
+
+	-- Hooks will manage incoming messages and errors
+	local good, err = xpcall(function() self.conn:think() end, debug.traceback)
+	if not good then
+		print(err)
+		return
+	end
+end
+
+
+function mt_irc:connect()
+	if self.connected then
+		minetest.log("error", "IRC: Ignoring attempt to connect when already connected.")
+		return
+	end
+	self.conn = irc.new({
+		nick = self.config.nick,
+		username = "Minetest",
+		realname = "Minetest",
+	})
+	self:doHook(self.conn)
+	good, message = pcall(function()
+		self.conn:connect({
+			host = self.config.server,
+			port = self.config.port,
+			pass = self.config.password,
+			timeout = self.config.timeout,
+			secure = self.config.secure
+		})
+	end)
+
+	if not good then
+		minetest.log("error", ("IRC: Connection error: %s: %s -- Reconnecting in ten minutes...")
+					:format(self.config.server, message))
+		minetest.after(600, function() self:connect() end)
+		return
+	end
+
+	if self.config.NSPass then
+		self:say("NickServ", "IDENTIFY "..self.config.NSPass)
+	end
+
+	self.conn:join(self.config.channel, self.config.key)
+	self.connected = true
+	minetest.log("action", "IRC: Connected!")
+	minetest.chat_send_all("IRC: Connected!")
+end
+
+
+function mt_irc:disconnect(message)
+	if self.connected then
+		--The OnDisconnect hook will clear self.connected and print a disconnect message
+		self.conn:disconnect(message)
+	end
+end
+
+
+function mt_irc:say(to, message)
+	if not message then
+		message = to
+		to = self.config.channel
+	end
+	to = to or self.config.channel
+
+	self:queue(irc.msgs.privmsg(to, message))
+end
+
+
+function mt_irc:reply(message)
+	if not self.last_from then
+		return
+	end
+	self:say(self.last_from, message)
+end
+
+function mt_irc:send(msg)
+	self.conn:send(msg)
+end
+
+function mt_irc:queue(msg)
+	self.conn:queue(msg)
+end
+