To support connecting to MPD instances on other hosts, or if the socket
is in a different location, the host and/or port can be specified using
either command-line arguments or environment variables. The behavior is
similar to that of `mpc` in that the password can be specified in the
host value using `password@host` syntax. The command-line arguments
override the environment variables. If neither are specified, the
default of `localhost:6600` is used.
This implementation does not include key bindings or a status icon,
because I wanted to keep it small, and both of those require linking
with and initializing GTK+.
Older versions of GObject had the "user data" parameter of most signal
handlers marked as required, some value had to be passed in, even if it
wasn't necessary.
Dustin
Dustin C. Hatch