init-script for airvideo-server using start-stop-daemon

airvideo-server

#!/bin/bash
#
# create a new user called airvideo
#    $ sudo adduser airvideo
# place this file in /etc/init.d/airvideo-server
# change the file permission to executable:
#    $ sudo chmod +w /etc/init.d/airvideo-server
# add it to default run level
#    $ sudo update-rc.d airvideo-server defaults
#
# Notes: make sure the folders in /opt/airvideo-server/AirVideoServerLinux.properties are readable by airvideo user

case "$1" in
  start)
    echo "Starting AirVideo"
    start-stop-daemon --start --quiet -b -m -p /var/run/airvideo-server.pid --chuid airvideo --exec /usr/bin/java -- -jar /opt/airvideo-server/AirVideoServerLinux.jar /opt/airvideo-server/AirVideoServerLinux.properties
  ;;
  stop)
    echo "Stopping AirVideo"
    start-stop-daemon --stop --quiet --pidfile /var/run/airvideo-server.pid
    rm -f /var/run/airvideo-server
  ;;
  *)
    echo "Usage: /etc/init.d/airvideo-server {start|stop}"
    exit 1
  ;;
esac
exit 0

Should that be chmod +x in the comments section instead of chmod +w?