init: MODE_OVERRIDE to allow code reuse from custom scripts

init.d/openwrt/functions

@@ -457,7 +457,7 @@ zapret_apply_firewall()
 	# always create ipsets. ip_exclude ipset is required
 	create_ipset no-update
 
-	case "${MODE}" in
+	case "${MODE_OVERRIDE:-$MODE}" in
 		tpws)
 			if [ ! "$MODE_HTTP" = "1" ] && [ ! "$MODE_HTTPS" = "1" ]; then
 				echo both http and https are disabled. not applying redirection.

init.d/openwrt/zapret

@@ -107,7 +107,7 @@ tpws_apply_socks_binds()
 start_service() {
 	local opt qn qns qn6 qns6
 
-	case "${MODE}" in
+	case "${MODE_OVERRIDE:-$MODE}" in
 		tpws)
 			opt="--port=$TPPORT $TPWS_OPT"
 			filter_apply_hostlist_target opt