openvpn: plug interface plugging into the add/delete paths

This wasn't completely right before, trying to plug into rules
reload paths and caused issues with people adding/deleting their
OpenVPN devices, but the rules tab not properly indicating this
since OpenVPN has become a pluggable interface.

src/etc/inc/openvpn_wizard.inc

@@ -732,6 +732,7 @@ function step12_submitphpaction()
     $config['openvpn']['openvpn-server'][] = $server;
 
     openvpn_resync('server', $server);
+    plugins_interfaces(false);
     write_config();
     header("Location: vpn_openvpn_server.php");
     exit;

src/www/vpn_openvpn_client.php

@@ -134,6 +134,7 @@ if ($_SERVER['REQUEST_METHOD'] === 'GET') {
         if (isset($id)) {
             openvpn_delete('client', $a_client[$id]);
             unset($a_client[$id]);
+            plugins_interfaces(false);
             write_config();
         }
         header("Location: vpn_openvpn_client.php");
@@ -146,6 +147,7 @@ if ($_SERVER['REQUEST_METHOD'] === 'GET') {
                     unset($a_client[$rulei]);
                 }
             }
+            plugins_interfaces(false);
             write_config();
         }
         header("Location: vpn_openvpn_client.php");
@@ -336,6 +338,7 @@ if ($_SERVER['REQUEST_METHOD'] === 'GET') {
             }
 
             openvpn_resync('client', $client);
+            plugins_interfaces(false);
             write_config();
 
             header("Location: vpn_openvpn_client.php");

src/www/vpn_openvpn_server.php

@@ -138,6 +138,7 @@ if ($_SERVER['REQUEST_METHOD'] === 'GET') {
         if (isset($a_server[$id])) {
             openvpn_delete('server', $a_server[$id]);
             unset($a_server[$id]);
+            plugins_interfaces(false);
             write_config();
         }
         header("Location: vpn_openvpn_server.php");
@@ -402,6 +403,7 @@ if ($_SERVER['REQUEST_METHOD'] === 'GET') {
             }
 
             openvpn_resync('server', $server);
+            plugins_interfaces(false);
             write_config();
             openvpn_resync_csc(); // dump client specific overrides, the required set may have changed