This code (added 7 years ago with commit b233c145) has been obsoleted
by the SongLoader class (added 3 years ago).

playlist_file_print() already handles stored playlists.  spl_print()
is never called with a successful result.

Replaces GLib's GError.

The "bool" type is built-in.

Merge locate_song_search() and locate_song_match().

Improve error reporting and handling.  command.c gets the new function
print_error(), which sends a GError to the client.

Same for "listplaylistinfo".

This updates the copyright header to all be the same, which is
pretty much an update of where to mail request for a copy of the GPL
and the years of the MPD project. This also puts all committers under
'The Music Player Project' umbrella. These entries should go
individually in the AUTHORS file, for consistancy.

Hide the details of the playlist behind wrapper functions.

Return true on success, instead of 0.  Converted the "detail"
parameter to bool.

Renamed one function.

PlaylistInfo() (notice the capital 'P') sends a stored playlist to the
client.  Move it to a separate library, where all the code which glues
the playlist and the MPD protocol together will live.

In generic PCM functions allowing all sample formats, pass a void
pointer instead of a char pointer.

Moved the software mixing code (used by crossfading) to a separate
library.

Don't use libc's rand() function, because it is slow.  Our own trivial
linear congruential generator is good enough for dithering.

redirect_stdin() is a daemonization function, and disconnecting from
the standard input is always a good idea for MPD.

Prepare for the migration to the GLib option parser, which uses
gboolean for flags.