Eliminate duplicate definition (in input plugin and decoder plugin).

Again, POSIX says strcasecmp is not in string.h.

According to POSIX and both OSX and Linux manpages,
strcasecmp comes from strings.h, not string.h.

Most OSes also have them available in string.h,
but we just fixed the headers on Haiku and it now
only provides them in strings.h.

We might want to fall back to string.h for other
OSes though...

cf.
http://pubs.opengroup.org/onlinepubs/009695399/functions/strcasecmp.html
http://linux.die.net/man/3/strcasecmp
https://developer.apple.com/library/mac/documentation/Darwin/Reference/ManPages/man3/strcasecmp.3.html

The "written" argument to shine_encode_buffer() and shine_flush() was
changed from "long" to "int", which breaks API and ABI compatibility.
This is a big deal, and it doesn't seem worthwile to keep support for
the (broken) 3.0 release.

In version 11, both ffmpeg and libav deprecate
AVCodecContext::codec_name.  The function avcodec_descriptor_get() has
been introduced long ago.

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.