Update to how we choose if we are running udevd or dumb-udev

This fixes some issues I found with startup.

overlay/etc/supervisor.d/dumb-udev.ini

@@ -1,15 +0,0 @@
-
-[program:udev]
-priority=10
-autostart=false
-autorestart=true
-user=root
-directory=/
-command=start-dumb-udev.sh
-stopsignal=INT
-stdout_logfile=/var/log/supervisor/dumb-udev.log
-stdout_logfile_maxbytes=10MB
-stdout_logfile_backups=7
-stderr_logfile=/var/log/supervisor/dumb-udev.err.log
-stderr_logfile_maxbytes=10MB
-stderr_logfile_backups=7