add chatcommand to update IRC server ingame without update minetest.conf and reboot

irc/chatcmds.lua

@@ -124,3 +124,19 @@ minetest.chatcommands["me"].func = function(name, param, ...)
 	irc:say(("* %s %s"):format(name, param))
 end
 
+minetest.register_chatcommand("irc_change_server", {
+	params = "<servername>",
+	description = "Change the IRC server.",
+	privs = {irc_admin=true},
+	func = function(name, param)
+		if param == "" then
+			minetest.chat_send_player(name, "Missing argument servername")
+			return
+		end
+		irc.config.server = param
+		irc.save_config()
+		minetest.chat_send_player(name, "New server IRC is \"".. param.."\".")
+		minetest.chat_send_player(name, "type \"/irc_reconnect\" to reconnect IRC.")
+	end
+})
+

irc/config.lua

@@ -57,3 +57,33 @@ if not irc.config.nick then
 	)
 end
 
+
+local config_file = minetest.get_worldpath() .. "/irc.txt"
+
+function irc.save_config()
+	local input, err = io.open(config_file, "w")
+	if input then
+		local conf = {server = irc.config.server}
+		input:write(minetest.serialize(conf))
+		input:close()
+	else
+		minetest.log("error", "open(" .. config_file .. ", 'w') failed: " .. err)
+	end
+end
+
+function irc.load_config()
+	local file = io.open(config_file, "r")
+	local settings = {}
+	if file then
+		settings = minetest.deserialize(file:read("*all"))
+		file:close()
+		if settings and type(settings) == "table" then
+			if settings["server"] ~= nil then
+				 irc.config.server = settings["server"]
+			end
+		end
+	end
+end
+
+irc.load_config()
+