allow user creation even if old email was denied+example
http://test.dwagn.org/wagn/JCA+story and http://test.dwagn.org/wagn/JCA+wiki exist but http://test.dwagn.org/wagn/JCA does not.
http://test.dwagn.org/wagn/JCA+story and http://test.dwagn.org/wagn/JCA+wiki exist but http://test.dwagn.org/wagn/JCA does not.