qosify: add missing config option for nat support

Signed-off-by: Felix Fietkau <[email protected]>

package/network/config/qosify/files/qosify.conf

@@ -17,6 +17,7 @@ config interface wan
 	option ingress 1
 	option egress 1
 	option mode diffserv4
+	option nat 1
 	option host_isolate 1
 	option autorate_ingress 1
 	option ingress_options ""

package/network/config/qosify/files/qosify.init

@@ -61,6 +61,7 @@ add_interface() {
 	add_option boolean ingress
 	add_option boolean egress
 	add_option string mode
+	add_option boolean nat
 	add_option boolean host_isolate
 	add_option boolean autorate_ingress
 	add_option string ingress_options