facebook/tornado — pull request #467 by ellisonbg (2012-02-22 19:49:23+00:00)
Title: Made redirect_handler_class/error_handler_class configurable.

There are two new fields in Application.settings that are used in
tornado.web for the redirect/error handler classes. These default
to web.RedirectHandler and web.ErrorHandler. These are now handled
in the same was the static_handler_class is. This allows for
subclasses of Application and RequestHandler to customize this
logic more easily.