* Explicit document missing X-Forwarded-Proto and X-Fowarded-Host headers.
* Add the name of the authorization header in error messages.
* Add error and debug logs about X-Original-URL header.
* Add error log when not able to parse target URL in verify endpoint.
* Fix unit tests.
* Encode URL set to rd parameter.
URL encoding that parameter solves PR #476.
Some URL parameters set during redirection were magically disappearing
after the redirection due to the authentication process. By using URL encoding,
those parameters should not be stripped anymore.
* Fix integration tests.
Instead of checking the value of the cookie expiration we rely
on the boolean stored in the user session to check whether inactivity
timeout should be disabled.
