Allows pulseaudio to use the idsdriver interface, making it almost as 
fast as using native pulseaudio calls for as far as directsound is 
concerned. Prevents the creation of separate winmm feeder threads.

WM_SETTEXT seems to check for {\rtf or {\urtf to determine if it is an
ascii RTF string, even if it is a unicode message.  So I removed the
check to see if it is a unicode message, and added a check for {\urtf.

These notifications are not always sent on some (but not all) win2k3/vista/win2k8 machines.