Adds Yahoo and Verisign to the list of support OpenID providers
There should be a null check here
Add code for the simple registration extension
Simple registration will work for Verisign, but based on the registration, it opens a security hole, so it will not be allowed.
Need this parameter that is put into the query string in the first part of the handshake
Merge pull request #764 from kaysoky/MoreOpenIDProviders

Improvements to OpenID code