For the range-based loop on a ConstBuffer object.

For EXIT_SUCCESS.

API simplification.  We can now avoid abusing a "size_t*" as
additional return value.

Stop HTTP clients from exploiting MPD via forged POST requests.

Several MPD subsystems can now read gzipped files; for example, the
database file can be gzipped.

When no track is found the error is now properly set.
Previously the calling function tried to log an undefined
error, which resulted in a crash. MPD falls back to
ffmpeg for unsupported tracks, such as ALAC.

This should fix issue 4051.

This plugin uses the MP4v2 library to play mp4/m4a files.
It is limited to file_decode.

The new class is pluggable, to prepare for gzipped database files.

For now, the TextFile class remains, and will be refactored away
later.

libfs.a depends on libsystem.a.

Support operating systems that don't have O_CLOEXEC.

Let the caller decide whether to strip.  Only remove \n and \r
(end-of-line markers).

Reduce the number of unnecessary memmove() calls.