strongswan: trigger reload when interfaces are specified

Fixes #20848

Add interface triggers if interfaces to listen to are specified in
`/etc/config/ipsec`. This fixes the "running with no instances" scenario
after rebooting a router.

Signed-off-by: Joel Low <joel@joelsplace.sg>
(cherry picked from commit f2d209e4ff)

net/strongswan/Makefile

@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=strongswan
 PKG_VERSION:=5.9.11
-PKG_RELEASE:=1
+PKG_RELEASE:=2
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.bz2
 PKG_SOURCE_URL:=https://download.strongswan.org/ https://download2.strongswan.org/

net/strongswan/files/swanctl.init

@@ -702,6 +702,16 @@ stop_service() {
 service_triggers() {
 	procd_add_reload_trigger "ipsec"
 	config load "ipsec"
+
+	config_foreach service_trigger_ipsec ipsec
+}
+
+service_trigger_ipsec() {
+	local interface interface_list
+	config_list_foreach "$1" interface append_var interface_list
+	for interface in $interface_list; do
+		procd_add_reload_interface_trigger $interface
+	done
 }
 
 start_service() {