mpd already does a much better job of validating arguments than we ever
could, so no point in us doing it too. Parsing arguments is also rather
pointless, as all arguments are coerced to strings before escaping anyway.
-# TODO: implement argument checking/parsing (?)
# TODO: check for EOF when reading and benchmark it
# TODO: converter support
# TODO: global for parsing MPD_HOST/MPD_PORT
# TODO: check for EOF when reading and benchmark it
# TODO: converter support
# TODO: global for parsing MPD_HOST/MPD_PORT