this->OwnsTag() accesses fields that are not yet initialized.

Instead of checking for "cover.jpg" in the virtual directory
representing the CUE sheet, check its enclosing directory.

Closes https://github.com/MusicPlayerDaemon/MPD/issues/1206

Updating the database no longer requires the `admin` permission, only
`control` is needed (changed in 2abad0f4).

See also: #1124

The script seems to assume package version numbers always end in numeric versions with an optional alpha-suffix. Alas, were it only so simple... Sometimes the package is called fizzbang-1.2.3+release_info in which case the build fails. No more!

Closes https://github.com/MusicPlayerDaemon/MPD/issues/1177

This fixes reading ID3 tags on remote files with the commands
"readcomments" and "readpicture".

Closes https://github.com/MusicPlayerDaemon/MPD/issues/1180

Make sure that ZeroconfDeinit() gets called even if startup fails with
an exception.  Fixes an assertion failure because an Avahi TimerEvent
is still active.

Closes https://github.com/MusicPlayerDaemon/MPD/issues/1192

Fixes the error:

 IllegalStateException: Not allowed to start service Intent { cmp=org.musicpd/.Main (has extras) }: app is in background

av_demuxer_iterate() was added in libavformat 58.9.100.

Closes https://github.com/MusicPlayerDaemon/MPD/issues/1178

Prevents a possible bug which occurs when the caller-provided open()
function throws; then the "uri" field is never set.

Prevent false negative after the stream was closed automatically after
20 seconds.

From libavformat/mov.c.

Closes https://github.com/MusicPlayerDaemon/MPD/issues/1173

This mapping was added 11 years ago in commit 766b9fd4, but FFmpeg
doesn't appear to support it.

These were added 11 years ago in commit 766b9fd4, but I cannot find
any evidence in the FFmpeg repository that these names were ever
supported.  This commit adds the tags as they are currently present in
libavformat/mov.c.

When updating everything, this did work, but if updating only a
subdirectory, the ".mpdignore" in the parents were not used.

Closes https://github.com/MusicPlayerDaemon/MPD/issues/1172

Fixes broken libavahi-client timeouts.

Don't propagate MPD-specific compiler flags to subprojects.