IDP3 HTTP-Artifact form encoding

[Cantor, Scott]

> I looked at HTTPArtifactEncoder and adjusted the bean definition for
> shibboleth.Encoders.SAML2ArtifactEncoder so that it uses postEncoding
> and gets the VelociytEngine. But there's a bug in HTTPArtifactEncoder's
> postEncode method: the OutputStreamWriter is never flushed. Adding
> outWriter.flush(); fixes that and then the post encoding of the artifact
> works.

And you filed the bug?

-- Scott