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/sshd.ini

@@ -1,8 +1,8 @@
 
 [program:sshd]
+priority=10
 autostart=true
 autorestart=true
-priority=10
 user=root
 command=/usr/sbin/sshd -Ddp "%(ENV_PORT_SSH)s"
 stopsignal=INT