fix: make variables local

mpd.lua

@@ -1,12 +1,9 @@
 -- MPD control and playlist editing
 -- prompts require dmpc script
 local M = {}
-local conf = conf
-local awful = awful
-local log = log
-
--- local functions
-local dmenu, notify, mpc
+local conf = require("localconf")
+local log = require("talkative")
+local naughty = require("naughty")
 
 local defaults = {}
 local settings = {}