fixes redirect initiation for targets that already have ...

... some query string predefined

Allow for passive IdP, for example, by adding ?IsPassive=true.
XML parsing error is not ignored
Forking to have validate{Post,Redirect}Response
use 'container' parameter, redirect uses req.query not .body
correct method called; validateRedirectResponse impl'd
ALways return after redirect when logging out
accepting redirect as well as post; redirect not verified
Merge branch 'always-return-after-logout-redirect'
Merge branch 'master' of D:\Herby\eranet\eranet\oauth2-for-apis\passport-saml with conflicts.