Add support for bootstrapping an unsolited Response when session is lost...

Add support for bootstrapping an unsolited Response when session is lost during login. The scenario this feature is targeted to solve is that end users is bookmarking the login page and returning to the login page after the session has timed out. Then the cache of the request is lost, and the SP is unlikely to be able to match the request with the response. The fallback that is implemented is that the response unsolited, meaning that the InResponseTo is dropped and the response does not need to be matched against a request.


git-svn-id: https://simplesamlphp.googlecode.com/svn/trunk@1245 44740490-163a-0410-bde0-09ae8108e29a