HTTP Artifact Binding not working

[Summerdave]

When i tried to force the IdP to use HTTP-Artifact on the SAML Response, the SP was unable to resolve the artifact. Diff to c57dc79c7c3b171a3d115920bfecdcb3a9e22371:

diff --git a/sp/etc-shibboleth/shibboleth2.xml b/sp/etc-shibboleth/shibboleth2.xml
index 79705fb..e72e313 100644
--- a/sp/etc-shibboleth/shibboleth2.xml
+++ b/sp/etc-shibboleth/shibboleth2.xml
@@ -41,13 +41,15 @@
             (Set discoveryProtocol to "WAYF" for legacy Shibboleth WAYF support.)
             You can also override entityID on /Login query string, or in RequestMap/htaccess.
             -->
-            <SSO entityID="https://idptestbed/idp/shibboleth">
+            <!--SSO entityID="https://idptestbed/idp/shibboleth">
               SAML2 SAML1
-            </SSO>
+            </SSO-->
 
             <!-- SAML and local-only logout. -->
             <Logout>SAML2 Local</Logout>
             
+            <SessionInitiator entityID="https://idptestbed/idp/shibboleth" signing="false" encryption="false" Location="https://idptestbed/Shibboleth.sso/Login" type="SAML2" acsIndex="3" isDefault="true" />
+            <md:AssertionConsumerService Binding="urn:oasis:names:tc:SAML:2.0:bindings:HTTP-Artifact" Location="/SAML2/Artifact" index="3"/>
             <!-- Extension service that generates "approximate" metadata based on SP configuration. -->
             <Handler type="MetadataGenerator" Location="/Metadata" signing="false"/>