[zwp]

> whatever "SSH-2.0-SSHD" is (the authors don't know either)

I think this is from the j2ssh/maverick SSH server, used in a bunch of enterprisey Java products.

https://jadaptive.com/en/products/java-ssh-server

https://github.com/sshtools/j2ssh-maverick/blob/ce11ceaf0aa0...