fixes #860 detect duplicates during upload

install/db/170-database.php

@@ -0,0 +1,22 @@
+<?php
+// +-----------------------------------------------------------------------+
+// | This file is part of Piwigo.                                          |
+// |                                                                       |
+// | For copyright and license information, please view the COPYING.txt    |
+// | file that was distributed with this source code.                      |
+// +-----------------------------------------------------------------------+
+
+if (!defined('PHPWG_ROOT_PATH'))
+{
+  die('Hacking attempt!');
+}
+
+$upgrade_description = 'add config parameter to handle duplicate on upload';
+
+// we set it to false in this upgrade script, as opposed to the default value
+// for a new installation, because it was the default behavior before Piwigo 14
+conf_update_param('upload_detect_duplicate', false);
+
+echo "\n".$upgrade_description."\n";
+
+?>