[OpenID] Backwards Compatibility

[SitG Admin]

>The user oriented tests you seem to be thinking of are possible but 
>a bit orthogonal to the testing needs of OPs and RPs.

User-oriented and developer-oriented, where "developer" is a user who 
hasn't been convinced yet that OpenID is secure, or for some reason 
is coding their own library from scratch (instead of using one of the 
pre-existing libraries) and wants to understand what each step is and 
how they all fit together.

-Shade