Allow printing remote playlists with the commands "listplaylist" and
"listplaylistinfo".

The new function playlist_open_any() combines playlist_mapper_open(),
playlist_list_open_uri() and playlist_list_open_stream(), providing an
easy API for all of them.

If the MIME type of a stream contains a semicolon, remove it and the
text after it to probe for a playlist plugin.

Return early on error, save one level of indent.

Merged both loops into playlist_list_open_stream().  This is needed
because playlist_list_open_stream() needs to know the MIME type, which
is only known after the stream has become "ready".

This buggy implementation failed to allow "..." sequences, because the
dot count was always zero.  The usefulness of allowing "..." (or more
dots) is debatable, but since it's a valid file name, we allow it.

libcue's track_get_length() returns 0 for the last track, because that
information is not available in the CUE sheet.  This makes MPD quit
playing the last track immediately.  If we set "song.end_ms=0", MPD
will play the track until the end of the song file, which is what we
want.

Fixes an assertion failure in the input_stream_seek() call.

This fixes test/run_output.

Replaces the expression [0-9]\+ by [0-9][0-9]* in autogen.sh. The
special character \+ is not POSIX compatible and thus not supported by
all sed implementations.

I've attached a patch that will make file URIs work on operating systems
that provide the getpeereid() function call to check the user ID of the
peer connected to a UNIX domain socket.

this greatly improves performance of commands that return a lot
of data, e.g. search results or recursive content of a directory,
while being connected to local mpd via tcp/ip socket.

Workaround for an assertion failure.

Rename the function to playlist_song_started(), which gets only called
if the song has actually started.

Race condition fix.

Fixes a clang warning.

libwrap support is in MPD but only for the control port.  This patch
adds support for the http port.  The code is copied from
src/client_new.c

Print those files which can be handled by a playlist plugin.

Memory leak fix.  The input_stream object passed to
playlist_list_open_stream_suffix() must be closed by the caller - this
however never happens in playlist_list_open_path(), because it does
not return it to the caller.

There is no useful return value here.

The return value of Player_LoadTitle() is allocated with malloc(), and
must be freed by the caller.

Added macros with better names: GME_BUFFER_FRAMES, GME_BUFFER_SAMPLES
(the former only used to calculate the latter).

Move into enums.