Sending redirection should make sure it doesn't get cached by browsers

[GoogleCodeExporter]

Otherwise, problems could arise. I suggest that the framework's header sending 
code does the following prior to sending the redirection headers:

header("Cache-Control: no-cache, must-revalidate"); // HTTP/1.1
header("Expires: Sat, 26 Jul 1997 05:00:00 GMT"); // Date in the past

Original issue reported on code.google.com by roman...@gmail.com on 25 Oct 2012 at 1:50