Since this will potentially run more than once (if rsyslog falls over and supervisord brings it back up), configure-and-run-rsyslog.sh probably needs to be updated, since it's not idempotent. It appends to /etc/rsyslog.conf.

I suspect that multiple lines of `*.* @@logs.papertrailapp.com:$PAPERTRAIL_PORT` will result in log events being sent to papertrail multiple times.