[OpenID] CheckIDRequest with Big AX

[Martin Atkins]

Pat Cappelaere wrote:
> Dick,
> 
> So I can only do a "checkid_immediate" request with AX as long as the  
> AX request is not tool large?
> Isn't it limiting?
> 

checkid_immediate still expects the user to be in the loop, since the 
provider will often need to verify cookies.

Likewise, checkid_immediate can (in theory, at least) be done via a 
form-initiated POST request if the request is too large for a GET.