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/vnc-audio.ini

@@ -1,8 +1,8 @@
 
 [program:audiostream]
+priority=30
 autostart=false
 autorestart=true
-priority=10
 user=%(ENV_USER)s
 command=tcpserver 127.0.0.1 %(ENV_PORT_AUDIO_STREAM)s gst-launch-1.0 -q pulsesrc server=/tmp/pulse/pulse-socket ! audio/x-raw, channels=2, rate=24000 ! cutter ! opusenc ! webmmux ! fdsink fd=1
 stopsignal=INT
@@ -14,9 +14,9 @@ stderr_logfile_maxbytes=10MB
 stderr_logfile_backups=7
 
 [program:audiowebsock]
+priority=40
 autostart=false
 autorestart=true
-priority=10
 user=%(ENV_USER)s
 command=/usr/local/bin/websockify %(ENV_PORT_AUDIO_WEBSOCKET)s localhost:%(ENV_PORT_AUDIO_STREAM)s
 stopsignal=INT