Documentation of known misuse of PulseAudio API

Documentation of known misuse of PulseAudio API

Hello.

Over time, I became aware of several instances of tempting but
semantically incorrect usage of PulseAudio API (one from my own bad
proposal of "improving" Wine, one from Parole media player and one
from Webkit-GTK). I want to document these gotchas so that other
developers don't fall for that. See the attached patch.

I have checked that the rendered HTML is correct, but need someone to
confirm the factual accuracy of the proposed changes and, possibly, to
improve the wording.

--
Alexander E. Patrakov