Allows the kernel to combine timer wakeups with other processes,
reducing power usage.

The pkg-config file has been added in Samba 4.0.  This commits adds a
fallback for older libsmbclient versions.

This commit adds the NeighborPlugin API which can be used to detect
nearby file servers that can be used by input plugins.  This list of
servers is exported using the new "listneighbors" command.  The idle
even "neighbor" notifies interested clients when a new neighbor is
found or an existing one is lost.

There's a lot missing currently: protocol&user documentation, and a
way to "mount" remote servers into the music database.  Obviously,
some code from the UPnP database plugin can be moved to a neighbor
plugin.

For debugging.

Prepare for more advanced daemonization code, which will not work with
daemon().  Let's just require fork().  Everybody who supports daemon()
also supports fork().

This encoding plugin features a fixed-point mp3 encoder,
with faster encoding on architectures without a FPU.

Right now the encoder is limited to stereo and 16 bit depth.
The bitrate and sample rate can be modified in audio_output.

audio_output {
        type            "httpd"
        name            "My shine stream"
        encoder         "shine"
        port            "8000"
        format          "44100:16:2"
        bitrate         "320"  # default: 128
}

Look for symbol "mpc_demux_init" which does not exist in SV7.  This
avoids build failures when SV7 was found by configure.ac.

[mk: renamed source files, applied coding style, reduced bloat, using
MPD's threading library, using MPD's error reporting and logging
library and refactoring, fixed lots of bugs]

Now that the remaining known bugs in poll() implementation are fixed,
we can go on without the GLib implementation.

If we have libyajl 2.0.1 (without a pkg-config file), our configure.ac
would assume this is the libyajl 1.0 API, because the function
yajl_alloc() exists in both.  This commit changes the library check to
the function yajl_parse_complete() which was removed in the 2.0 API.
This fixes build failure with libyajl 2.0.1.

Due to recent protocol additions ("addtagid", "cleartagid").

Allows building without GLib.  This fails to compile currently,
because GLib is still used in the MPD core.

Rename HAVE_WINDOWS to host_is_windows for consistency.
Use 'yes' as true value instead of '1' for this variable.
Use test on this variable instead of case where applicable.

Remove compatibility code.

This change adds two configuration options:

  --with-eventloop=[glib|internal|auto]
  --with-pollmethod=[epoll|auto]

First allows switching between GLib event loop and internal one.
Second chooses backend to use for internal event loop.
Conditional compilation symbols are changed accordingly.
Additional helper macro MPD_OPTIONAL_FUNC_NODEF is added as well.

The option "--enable-fluidsynth" was documented to be "auto" by
default, when it was really "no".