Some mpd/protocol updates

Hello! I made a few updates to the protocol module. The first is that I cleaned up music_db a bit. It seems like The capture actually wasn't working when the field name was in quotes, since \b doesn't count a double quote as a word character, so it would only match if there was an alphanumeric preceding the quotes. The other commit is that decoupling of the config password from the protocol module I was whining about the other day; not sure what the consensus is on that!