uspd: reload sysctl config every time network is reloaded

uspd/files/etc/init.d/uspd

@@ -45,19 +45,35 @@ configure_uspd()
 	fi
 }
 
+apply_sysctl_configuration() {
+	local sysctl_conf
+
+	sysctl_conf="/etc/bbfdm/sysctl.conf"
+	
+	[ -f "${sysctl_conf}" ] || touch "${sysctl_conf}"
+
+	sysctl -e -p "${sysctl_conf}" >&-
+}
+
 start_service() {
+	local sysctl_reload
+
+	ubus -t 5 wait_for network.device
+	[ "$?" -eq 0 ] && sysctl_reload=1
+
 	procd_open_instance usp
 	configure_uspd
 	procd_set_param respawn
 	procd_close_instance
+
+	[ "${sysctl_reload}" -eq 1 ] && apply_sysctl_configuration
 }
 
 reload_service() {
-	stop
-	start
+	apply_sysctl_configuration
 }
 
 service_triggers()
 {
-	procd_add_reload_trigger "uspd"
+	procd_add_reload_trigger "uspd" "network"
 }