Currently it's quite impossible to maintain custom error pages for HTTP 404 and still keep the proper response code
If we redirect with routes_onerror we can get every error page dressed in overall page layout, but the response code is 200 OK, which isn't very good. If we do not redirect, we could always set the body when raising 404 errors, but then you'd have to define routes for every controller and action and direct catch all pattern to controller::action responsible just for raising HTTP 404 error. is there any solution to this problem, or plans on fixing it?
