OpenSSH 2.3.0p1 port to BSDI BSD/OS

[David J. MacKenzie]

BTW, the KRB4 parts of the BSD/OS patch are independent of the others.
Feel free to apply the rest of it, which I think it clean, if you
don't want to deal with the KRB4 mess right now.  It's only needed
anyway when configuring --with-kerberos4=/usr which isn't so important
on a system that has a pluggable authentication mechanism anyway.