The firewall_type is ignored if not set in rc.conf or rc.conf.local,

after r190575 there is an option to call rc.firewall with the firewall_type
passed in as an argument.

Submitted by:	David P. Discher <dpd@dpdtech.com>
MFC after:	3 weeks.
Sponsored by:	iXsystems Inc.
Differential Revision:	https://reviews.freebsd.org/D14286

etc/rc.d/ipfw

@@ -40,7 +40,11 @@ ipfw_start()
 {
 	local   _firewall_type
 
+	if [ -n "${1}" ]; then
 		_firewall_type=$1
+	else
+		_firewall_type=${firewall_type}
+	fi
 
 	# set the firewall rules script if none was specified
 	[ -z "${firewall_script}" ] && firewall_script=/etc/rc.firewall

etc/rc.firewall

@@ -112,12 +112,20 @@ setup_ipv6_mandatory() {
 	${fwcmd} add pass ipv6-icmp from any to any icmp6types 2,135,136
 }
 
+. /etc/rc.subr
+. /etc/network.subr
+
 if [ -n "${1}" ]; then
 	firewall_type="${1}"
 fi
+if [ -z "${firewall_rc_config_load}" ]; then
+        load_rc_config ipfw
+else
+        for i in ${firewall_rc_config_load}; do
+                load_rc_config $i
+        done
+fi
 
-. /etc/rc.subr
-. /etc/network.subr
 afexists inet6
 ipv6_available=$?