Disable ntop on startup

[Snoopy]

As we all know, ntop on v1.2.3 is flaky, sometimes it works for months, sometimes only a few hours. But it is still a good tool for debugging, so I'd like to keep the package. But it still started during reboot. How to disable it?

I tried to examine scripts in usr/local/etc/rc.d, but my *nix knowledge is not enough to handle it. I have darkstat package too, and it does not start on boot. So I compared ntop.sh/darkstat.sh, they are the essentially the same. ntop/darkstat files are different:

darkstat:

#!/bin/sh
. /etc/rc.subr

name=darkstat
rcvar=`set_rcvar`

command=/usr/local/sbin/$name
start_precmd=darkstat_prestart

load_rc_config $name
: ${darkstat_enable="NO"}
: ${darkstat_dir="/var/run/darkstat"}
: ${darkstat_pidname="darkstat.pid"}
: ${darkstat_dropuser="nobody"}
: ${darkstat_flags=""}
pidfile="${darkstat_dir}/${darkstat_pidname}"

darkstat_prestart()
{
	if [ "x${darkstat_interface}" = "x" ]; then
		err 1 "You must define \$darkstat_interface."
	fi
	mkdir -p ${darkstat_dir}
	chown ${darkstat_dropuser} ${darkstat_dir}
	chmod u+wx ${darkstat_dir}
}

darkstat_flags="-i ${darkstat_interface} --chroot ${darkstat_dir} \
--pidfile ${darkstat_pidname} --user ${darkstat_dropuser} \
${darkstat_flags}"

run_rc_command "$1"

ntop:

. /etc/rc.subr

name=ntop
rcvar=${name}_enable

load_rc_config $name

: ${ntop_enable="NO"}
: ${ntop_flags="-d --use-syslog=daemon"}

command=/usr/local/bin/ntop
start_precmd="${name}_checkpw"

ntop_checkpw()
{
	if [ ! -f /var/db/ntop/ntop_pw.db ]; then
		err 1 "Please set admin password for ntop. Run '/usr/local/bin/ntop -u nobody -A'"
	fi
}

run_rc_command "$1"

What should I edit in ntop?