My request is to change the portsentry ports so that it installs a sample startup file in etc/rc.d. I included my own.

Fix: 

PORTSENTRY="/usr/local/bin/portsentry"

case "$1" in
        start)  
                echo -n ' portsentry ('
                ${PORTSENTRY} -tcp > /dev/null && echo -n 'tcp'
                ${PORTSENTRY} -udp > /dev/null && echo -n ' udp'
                echo -n ')'
                ;;
        stop)   
                killall `basename ${PORTSENTRY}`
                ;;
        *)
                echo "Usage: `basename $0` {start|stop}" >&2
                ;;
esac