Original explanation from pull request:
I'm Using symfony2 with URL Rewriting to 'hide' index.php.
On form authentication, symfony2 redirect to http://host:port/index.php/login_path instead of http://host:port/login_path. I do understand that, in my case, redirect is set into one of :
FormAuthenticationEntryPoint with getUriForPath()
FormAuthenticationListener with getUriForPath()
Security/Firewal/ExceptionListener with getUri()
This path modify getUri and getUriForPath to :
remove default port from URI
remove script name if not initially present
