net/upnp: add newwanip hook

This could potentially disrupt operation for no apparent reason
since this wasn't included and asked for for a long time now.

PR: https://forum.opnsense.org/index.php?topic=36912.0

net/upnp/Makefile

@@ -1,6 +1,6 @@
 PLUGIN_NAME=		upnp
 PLUGIN_VERSION=		1.5
-PLUGIN_REVISION=	4
+PLUGIN_REVISION=	5
 PLUGIN_DEPENDS=		miniupnpd
 PLUGIN_COMMENT=		Universal Plug and Play Service
 PLUGIN_MAINTAINER=	franco@opnsense.org

net/upnp/src/etc/inc/plugins.inc.d/miniupnpd.inc

@@ -88,7 +88,10 @@ function miniupnpd_stop()
 
 function miniupnpd_configure()
 {
-    return ['bootup' => ['miniupnpd_configure_do']];
+    return [
+        'bootup' => ['miniupnpd_configure_do'],
+        'newwanip' => ['miniupnpd_configure_do'],
+    ];
 }
 
 function miniupnpd_uuid()