Also remove useless AUTHENTICATION code. We have never compiled this here, and it is doubtful that it even works without crypto.
Add some buffer overrun fixes from OpenBSD and myself. Add skey calculator kludge from OpenBSD. TODO: do a real merge of dab's sources... probably just make telnet and telnetd contrib software. Obtained from: OpenBSD, dab@bsdi.com
(Don't think I don't realize what a big f*ckup this was.) Submitted by: geoff.