NB: big update - may break stuff. Please test!

NB: big update - may break stuff. Please test!

 - (djm) OpenBSD CVS sync:
   - markus@cvs.openbsd.org  2001/02/03 03:08:38
     [auth-options.c auth-rh-rsa.c auth-rhosts.c auth.c canohost.c]
     [canohost.h servconf.c servconf.h session.c sshconnect1.c sshd.8]
     [sshd_config]
     make ReverseMappingCheck optional in sshd_config; ok djm@,dugsong@
   - markus@cvs.openbsd.org  2001/02/03 03:19:51
     [ssh.1 sshd.8 sshd_config]
     Skey is now called ChallengeResponse
   - markus@cvs.openbsd.org  2001/02/03 03:43:09
     [sshd.8]
     use no-pty option in .ssh/authorized_keys* if you need a 8-bit clean
     channel. note from Erik.Anggard@cygate.se (pr/1659)
   - stevesk@cvs.openbsd.org 2001/02/03 10:03:06
     [ssh.1]
     typos; ok markus@
   - djm@cvs.openbsd.org     2001/02/04 04:11:56
     [scp.1 sftp-server.c ssh.1 sshd.8 sftp-client.c sftp-client.h]
     [sftp-common.c sftp-common.h sftp-int.c sftp-int.h sftp.1 sftp.c]
     Basic interactive sftp client; ok theo@
 - (djm) Update RPM specs for new sftp binary
 - (djm) Update several bits for new optional reverse lookup stuff. I
   think I got them all.