Warren's fix in r4872 made phpMp work again, but also broke
the unit tests completely (they work in this version).

The version in 0.12.0 is far too buggy (it was from mpd-ke, what
do you expect?).  This one passes all the unit tests that the
mpd-ke one passed, and should also work with phpMp when used
with PHP magic quotes.

This also means we can search on 100 (or more) tags at once, so
no more arbitrary limits other than system memory.

To run the unit tests, just do this:
gcc -o t -DUNIT_TEST=1 src/buffer2array.c && ./t && echo OK

git-svn-id: https://svn.musicpd.org/mpd/trunk@4874 09075e82-0dd4-0310-85a5-a0d7c8717e4f