[web2py] Custom 404 page with no 404 status

[zdzana]

I created my own error pages for 400/404 using routes_onerror. This
works well, but the problem is the lack of proper http status (200
instead of the expected 404). Is there a way to error on my web page
to set the status of 404 in reply? response.status = 404 redirects to
my own page that redirects ... into an infinite loop of redirects. Is
it possible to set the status without redirection?