wireguard-tools: add protocol renew handler

- add a renew handler
- add a peer detect handler

( benefits from https://github.com/openwrt/netifd/pull/66 )

Signed-off-by: Paul Donald <newtwen+github@gmail.com>
Link: https://github.com/openwrt/openwrt/pull/21784
Signed-off-by: Robert Marko <robimarko@gmail.com>
(cherry picked from commit 400742a855)
Link: https://github.com/openwrt/openwrt/pull/21840
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

package/network/utils/wireguard-tools/files/wireguard.sh

@@ -16,6 +16,9 @@ fi
 }
 
 proto_wireguard_init_config() {
+	renew_handler=1
+	peer_detect=1
+
 	proto_config_add_string "private_key"
 	proto_config_add_int "listen_port"
 	proto_config_add_int "mtu"
@@ -203,6 +206,11 @@ proto_wireguard_setup() {
 	proto_send_update "${config}"
 }
 
+proto_wireguard_renew() {
+	local interface="$1"
+	proto_wireguard_setup "$interface"
+}
+
 proto_wireguard_teardown() {
 	local config="$1"
 	ip link del dev "${config}" >/dev/null 2>&1