ChangeLog and TODO have been updated to reflect "addid"
improvement.

esd support has been removed from the TODO, PulseAudio
supercedes esd and we already have a PulseAudio output.

Moving NAS, SUN, OSX mixer/output off into the unknown because
nobody seems to use them or care enough to implement them (I
sure don't).

git-svn-id: https://svn.musicpd.org/mpd/trunk@7187 09075e82-0dd4-0310-85a5-a0d7c8717e4f