Fix for #1535 - Provide hooks to plugin custom connectors and avoid modification in core files

Impact Areas

• User sessions
• Inline cache

include/utils/utils.php

@@ -40,6 +40,7 @@ require_once 'vtlib/Vtiger/Deprecated.php';
require_once 'includes/runtime/Cache.php';
require_once 'modules/Vtiger/helpers/Util.php';
require_once 'vtlib/Vtiger/AccessControl.php';
+require_once 'includes/runtime/Configs.php';
// Constants to be defined here
// For Migration status.