fbsd11 & sshv1

[Roger Marquis]

> I believe FreeBSD should just have a slave port with OpenSSH 7.4, used only
> for SSHv1. People using such port should know the consequences of it.

This could be a good candidate for a new ports category,

   /usr/ports/legacy

If implemented there is a lot of code, in both ports and base, that
should be relocated.  (telnet, rsh/rlogin/rcp/..., nis/yp, rpc.*, cvs,
games, ppp, sendmail, finger, ...)

Roger