fix for sun /bin/mail

[alkahest!joshua () dee retix com (joshua geller)]

I am sorry, I was sure I had saved this information but it seems
I hadn't. there were several fixes proposed, one of which was a
port of (I believe) netbsd's /usr/libexec/mail.local. this is the
one I am really interested in. so if someone would mail the exploit
and fix information to me I would surely appreciate it.

josh