allow multiple qs args for destination url

JWTCacheHandler test

link to config.yml lines for `vouch.domain`

Merge branch 'master' into feature/cache_jwt_and_response

Merge branch 'master' into feature/license

no protocol-less URLs

post_logout_redirect_uri

/login and /logout URL redirection documentation

check if config file is well formed

vouch#210 set session cookie SameSite