When the same URL was used for many bindings, the current code did not
work. Now we use
lasso_saml20_provider_check_assertion_consumer_service_url() to validate
url and binding are matching, if no binding is suggested we take the
first one defined for this URL.
Using AssertionConsumerServiceIndex and any of the other assertion
consumer designator attributes is still forbidden.
Benjamin Dauvergne
9f99176b3c