wireguard: show server vpn ip in show client page

Reviewed-by: James Valleroy <jvalleroy@mailbox.org>

plinth/modules/wireguard/templates/wireguard_show_client.html

@@ -41,6 +41,10 @@
           <th>{% trans "Server public key:" %}</th>
           <td>{{ server.public_key }}</td>
         </tr>
+        <tr class="server-ip">
+          <th>{% trans "Server VPN IP address for services:" %}</th>
+          <td>{{ server.ip_address }}</td>
+        </tr>
       </tbody>
     </table>
   </div>