Generic library for scanning APE tags.  Eliminated one "goto"!

Fixes a regression: for output_plugin.delay(), we added a method to
the timer class which returns the delay in milliseconds.  This fails
to detect negative values, because the unsigned integer is divided by
1000, and then casted to signed.

Conflicts:
	NEWS
	configure.ac

After popular demand, I've switched the order of "artist" and "title"
in the stream title.  There is no standard, and there is no reliable
way to parse those from the stream title.

Call access() and print an extra error message when EACCES is
returned.  Hopefully this will reduce the number of support requests
due to wrong file permissions.

The assertion added in MPD 0.15.14 was too much, it failed when the
MIME type of a stream was NULL.

Conflicts:
	NEWS
	configure.ac
	src/decoder_control.c
	src/decoder_control.h
	src/input/rewind_input_plugin.c
	src/output_control.c
	src/output_thread.c
	src/player_thread.c

When one song is played twice, and the decoder is working on the
second "instance", but the first should be seeked, the check in
player_seek_decoder() may assume that it can reuse the decoder without
exchanging pipes.  The last thing was the mistake: the pipe pointer
was different, which led to an assertion failure.  This patch adds
another check which exchanges the player pipe.

More abstraction for decoder_control.pipe.

Some abstraction for decoder_control.pipe access.

Duplicate the "mime" attribute of the inner input_stream object,
instead of copying the pointer.

This makes the plugin more responsive to control commands, because it
will listen to control events while waiting.

This method is used to reduce the delay of commands issued to the
shout plugin.

Same as ".m4a".

Change the assertion on "fail_timer==NULL" in OPEN to a runtime check.
This assertion crashed when the output thread failed while the player
thread was calling audio_output_open().

Protect the attributes "open" and "fail_timer".

Protect the attributes "open" and "fail_timer".

When you pass the flag AI_ADDRCONFIG to getaddrinfo(), it does not
consider address families on the loopback device.  When run on a
machine without an external network card, just with "lo", it was
unable to look up any address.

libffado documentation says this function returns -1 on error, but
that is a lie - it returns a boolean value, and "false" means error.

.. instead of av_get_bits_per_sample_format().  The SampleFormat enum
value is authoritative.

Device can be specified either by magic index (starting with 0)
or by device name.

If no device is available test_default_device returns false.

Using libffado, to play on firewire audio devices.

Warning: this plugin was not tested successfully.  I just couldn't
keep libffado2 from crashing.  Use at your own risk.

For details, see my Debian bug reports:

  http://bugs.debian.org/601657
  http://bugs.debian.org/601659