Directories are loaded in reverse order when MPD starts. Only fixed
when doing a rescan.

The FLAC playlist plugin has been superseded by the "embcue" playlist
plugin, which can read the embedded CUE sheets of all formats.

An embedded CUE sheet must always point to the song file it is
contained in.

This finally enables the new embedded CUE sheet code: when a song file
contains a playlist, it is printed in the "lsinfo" output, so clients
get to know about this.

Use _scan() instead, to have more control.

Parses CUE data from the "CUESHEET" tag.  Needs further integration in
the update thread.

Prepare for big CUESHEET tags.

The new method pair() receives an arbitrary name/value pair.  Support
for this is being added to a few decoder plugins.

Remove clutter from wavpack_scan_file(), and use a (large) fixed
buffer for the tag item.

Fixes build regression.

Pass a callback table to scan_file() and scan_stream(), instead of
returning a tag object.

When gme_track_info() returns with success, then the gme_info_t
pointer must be set.

All supported ffmpeg/libav versions have this.

The only other libFLAC call (seek) does not produce fatal errors.

Call it in the function that also invokved
FLAC__stream_decoder_init_*().

https://www.xkcd.com/292/

The struct is smaller because it is sparse.  Its traversal is also
more efficient.

To replace libcue, the unmaintained and crashy library.