please support kerberos authentication

[GitMensch]

Using OpenSSH I can directly login to other machines because of Kerberos authentication (user name is enough). It would be nice to be able to do the same with pony-ssh as this removes the current need for an SSH agent running.

[thingalon]

It looks like the SSH library which Pony SSH uses (along with just about everything else in the VSCode ecosystem) doesn't support Kerberos / GSSAPI auth.

Before it could be added to PonySSH, we'd have to create that functionality in a PR to the SSH2 repository. That's a larger project than I can commit to tackling right now, I'm afraid.