Restoring no trace in git (@diosmosis add this change to a changelist "do not...

Restoring no trace in git (@diosmosis add this change to a changelist "do not commit" so you don't have to remember not to commit to git master) - for security reasons we prefer not showing backtrace

core/FrontController.php

@@ -131,7 +131,7 @@ class FrontController
         } catch (Exception $e) {
             $debugTrace = $e->getTraceAsString();
             $message = Common::sanitizeInputValue($e->getMessage());
-            Piwik_ExitWithMessage($message, '' . $debugTrace , true);
+            Piwik_ExitWithMessage($message, '' /* $debugTrace */, true);
         }
     }