cakephp/cakephp — pull request #5401 by markstory (2014-12-13 02:51:50+00:00)
Title: Automatically select the App ErrorController.

If the application implements an ErrorController, use that instead of the core one. This provides an easy convention based way for developers to customize error handling. If you need plugin controllers, you'll still have to override the renderer as well.

Refs cakephp/docs#2112