[CM] sndlib ESD support

[Bill Schottstaedt]

> I'd like to [...] change the output functions to be purely callback-driven.

I'm replying to myself, which is not a good sign, but this won't work
after all.  If you're using the default setup in Fedora, you're
using ALSA with the default device "pulse" which goes to pulseaudio,
which can't work in this way.  So, I gain nothing by making any
changes! I did at least get rid of the OSX deprecated function warnings.