What's the norm /usr/pkg/etc/rc.d vs /etc/rc.d for pkg daemons?

[Mayuresh <mayuresh%acm.org@localhost>]

Different packages seem to see it differently:

# pwd
/usr/pkg/etc/rc.d

# grep rc.subr * | grep -v \#
kadmind:. /etc/rc.subr
kcm:. /etc/rc.subr
kdc:. /etc/rc.subr
kpasswdd:. /etc/rc.subr
lighttpd:$_rc_subr_loaded . /usr/pkg/etc/rc.subr
mariadb:if [ -f /etc/rc.subr ]
mariadb:        . /etc/rc.subr

-- 
Mayuresh