If forwarders were specified on the command line, create an empty

resolvconf.conf so that resolvconf won't replace the manually configured
forwarders with dynamically configured ones the next time the lease is
renewed.

usr.sbin/unbound/local-setup/local-unbound-setup.sh

@@ -172,13 +172,18 @@ do_not_edit() {
 # the libc resolver will try unbound first.
 #
 gen_resolvconf_conf() {
+	local style="$1"
 	do_not_edit
 	echo "resolv_conf=\"/dev/null\" # prevent updating ${resolv_conf}"
-	echo "unbound_conf=\"${forward_conf}\""
-	echo "unbound_pid=\"${pidfile}\""
-	echo "unbound_service=\"${service}\""
-	# resolvconf(8) likes to restart rather than reload
-	echo "unbound_restart=\"service ${service} reload\""
+	if [ "${style}" = "dynamic" ] ; then
+		echo "unbound_conf=\"${forward_conf}\""
+		echo "unbound_pid=\"${pidfile}\""
+		echo "unbound_service=\"${service}\""
+		# resolvconf(8) likes to restart rather than reload
+		echo "unbound_restart=\"service ${service} reload\""
+	else
+		echo "# Static DNS configuration"
+	fi
 }
 
 #
@@ -379,6 +384,9 @@ main() {
 	if [ -z "$forwarders" ] ; then
 		echo "Extracting forwarders from ${resolv_conf}."
 		forwarders=$(get_nameservers <"${resolv_conf}")
+		style=dynamic
+	else
+		style=static
 	fi
 
 	#
@@ -440,7 +448,7 @@ main() {
 	# instead of resolv.conf.
 	#
 	local tmp_resolvconf_conf=$(mktemp -u "${resolvconf_conf}.XXXXX")
-	gen_resolvconf_conf | unexpand >"${tmp_resolvconf_conf}"
+	gen_resolvconf_conf "${style}" | unexpand >"${tmp_resolvconf_conf}"
 	replace "${resolvconf_conf}" "${tmp_resolvconf_conf}"
 
 	#