CRM-17789 Allow end users to stop the switch to mysqli for the dsn

diff --git a/CRM/Core/DAO.php b/CRM/Core/DAO.php
index c23fd9355bcce280f52f9ac989506ddcdda08e1b..9dba9ef5460edda03a20b294c804045f0e847e9b 100644 (file)
--- a/CRM/Core/DAO.php
+++ b/CRM/Core/DAO.php
@@ -32,6 +32,10 @@
  * @copyright CiviCRM LLC (c) 2004-2016
  */
 
+if (!defined('DB_DSN_MODE')) {
+  define('DB_DSN_MODE', 'auto');
+}
+
 require_once 'PEAR.php';
 require_once 'DB/DataObject.php';