IdP access to server environment variables

[Liam Hoekenga]

> You'll have to work with your container.  The IdP has absolutely no
> control over what appears in the Servlet request.

I think I figured this bit out, and I think I need to follow Jim's  
suggestion in modifying the login handler.  The environment variable  
is only going to be available in the locations protect by the SSO,  
which after another recent conversation with you guys, I reduced to  
/idp/Authn/.

Am I limited to the declarations in LoginHandler (of which the most  
likely candidate would be AUTHENTICATION_METHOD_KEY, tho I don't think  
that's really an appropriate place to put this)?  Or can I use my own  
attribute names with httpRequest.setAttribute, and expect they'll make  
it in to /some/ context?

Liam