[AD] pthread timer and event processing

[Peter Wang <tjaden@xxxxxxxxxx>]

http://www.alphalink.com.au/~tjaden/dev/ptimer5.diff.gz

Works For Me, but I'm not too sure about all of it (bloody threads),
and I pretty sure I didn't follow George's intent when he wrote the
original pthreads stuff.  Anyway, I'll leave that patch there for
comment or for someone else to hack on.

I also updated the QNX port to use the same pthreads stuff instead
of the sigalrm stuff, but my sound card doesn't work under QNX, so I
couldn't test that part of it.

-- 
tjaden@xxxxxxxxxx - http://www.alphalink.com.au/~tjaden/
SNOWPHOBIA, n.  The fear of being a flake.  -- Rich Hall, "Sniglets"