CRM-17212: Use pantheon detection to switch file session to storage

extern/authorizeIPN.php

@@ -31,7 +31,9 @@
  * $Id$
  */
 
-ini_set('session.save_handler', 'files');
+if (defined('PANTHEON_ENVIRONMENT')) {
+  ini_set('session.save_handler', 'files');
+}
 session_start();
 
 require_once '../civicrm.config.php';

extern/googleNotify.php

@@ -31,7 +31,7 @@
  * $Id$
  */
 
-if (!empty($_SERVER['PRESSFLOW_SETTINGS'])) {
+if (defined('PANTHEON_ENVIRONMENT')) {
   ini_set('session.save_handler', 'files');
 }
 session_start();

extern/ipn.php

@@ -31,7 +31,7 @@
  * $Id$
  */
 
-if (!empty($_SERVER['PRESSFLOW_SETTINGS'])) {
+if (defined('PANTHEON_ENVIRONMENT')) {
   ini_set('session.save_handler', 'files');
 }
 session_start();

extern/pxIPN.php

@@ -10,7 +10,7 @@
  * in creating this payment processor module
  */
 
-if (!empty($_SERVER['PRESSFLOW_SETTINGS'])) {
+if (defined('PANTHEON_ENVIRONMENT')) {
   ini_set('session.save_handler', 'files');
 }
 session_start();

extern/rest.php

@@ -28,7 +28,7 @@
 require_once '../civicrm.config.php';
 $config = CRM_Core_Config::singleton();
 
-if (!empty($_SERVER['PRESSFLOW_SETTINGS'])) {
+if (defined('PANTHEON_ENVIRONMENT')) {
   ini_set('session.save_handler', 'files');
 }
 session_start();

extern/soap.php

@@ -33,7 +33,7 @@ if (phpversion() == "5.2.2" &&
   $GLOBALS['HTTP_RAW_POST_DATA'] = file_get_contents('php://input');
 }
 
-if (!empty($_SERVER['PRESSFLOW_SETTINGS'])) {
+if (defined('PANTHEON_ENVIRONMENT')) {
   ini_set('session.save_handler', 'files');
 }
 session_start();