Improvements to pulseaudio

- Add a DEBUGGING flag
- Make the location of the unix socket configurable

While I was here I moved all the priority configs in supervisord to the top. I like it better there

overlay/etc/supervisor.d/udev.ini

@@ -1,8 +1,8 @@
 
 [program:udev]
+priority=10
 autostart=false
 autorestart=true
-priority=10
 user=root
 directory=/
 command=/usr/bin/start-udev.sh