Merge branch 'develop-ascraeus' into develop

* develop-ascraeus:
  [ticket/13361] Rename exception to runtime_exception
  [ticket/13361] Fix the JsonResponse in the exception listener
  [ticket/13361] Add tests
  [ticket/13361] Support ajax request (send a json response)
  [ticket/13361] Improve the exception listener

phpBB/phpbb/controller/helper.php

@@ -187,6 +187,8 @@ class helper
 	* @param string $message The error message
 	* @param int $code The error code (e.g. 404, 500, 503, etc.)
 	* @return Response A Response instance
+	*
+	* @deprecated 3.1.3 (To be removed: 3.3.0) Use exceptions instead.
 	*/
 	public function error($message, $code = 500)
 	{