establish second connection to the same server without GSSAPI As I understood the description, it's not even that: you would need to establish two connections,

establish second connection to the same server without GSSAPI As I understood the description, it's not even that: you would need to establish two connections, both with GSSAPI and using the same username, but with different credential scoping options (the text says with or without credential delegation, but GSSAPI has other options besides delegation and it's not clear to me if that's just an example). In such a case, the client has no control over which connection would actually be used.