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/cont-init.d/50-configure_pulseaudio.sh

@@ -11,13 +11,24 @@ else
     echo "Configure pulseaudio to pipe audio to a socket"
     mkdir -p /tmp/pulse
     chmod -R a+rw /tmp/pulse
+
     # Configure the palse audio socket
-    sed -i 's|^; default-server.*$|default-server = unix:/tmp/pulse/pulse-socket|' /etc/pulse/client.conf
+    export PULSE_SERVER=${PULSE_SERVER:-unix:/tmp/pulse/pulse-socket}
+    sed -i "s|^; default-server.*$|default-server = ${PULSE_SERVER}|" /etc/pulse/client.conf
     sed -i 's|^load-module module-native-protocol-unix.*$|load-module module-native-protocol-unix socket=/tmp/pulse/pulse-socket auth-anonymous=1|' \
         /etc/pulse/default.pa
+
     # Disable pulseaudio from respawning (https://unix.stackexchange.com/questions/204522/how-does-pulseaudio-start)
     sed -i 's|^; autospawn.*$|autospawn = no|' /etc/pulse/client.conf
-    sed -i 's|^; daemon-binary.*$|daemon-binary = /bin/true |' /etc/pulse/client.conf
+    sed -i 's|^; daemon-binary.*$|daemon-binary = /bin/true|' /etc/pulse/client.conf
+
+    # Enable debug logging
+    if [ "X${DEBUGGING:-}" == "X" ]; then
+        sed -i 's|^; log-level.*$|log-level = debug|' /etc/pulse/daemon.conf
+    fi
+
+    # Make startup script executable
+    chmod +x /usr/bin/start-pulseaudio.sh
 fi
 chown -R ${USER} /etc/pulse