Add support for curve448-sha512
https://datatracker.ietf.org/doc/draft-ietf-curdle-ssh-curves/
Add support for curve448-sha512
https://datatracker.ietf.org/doc/draft-ietf-curdle-ssh-curves/
Just for the record, the OpenSSH position to implementing this key exchange algorithm:
https://lists.mindrot.org/pipermail/openssh-unix-dev/2018-September/037187.html