Remove references to ChallengeResponseAuthentication in favour of

KbdInteractiveAuthentication.  The former is what was in SSHv1, the
latter is what is in SSHv2 (RFC4256) and they were treated as somewhat
but not entirely equivalent.  We retain the old name as deprecated alias
so config files continue to work and a reference in the man page for
people looking for it.

Prompted by bz#3303 which pointed out the discrepancy between the two
when used with Match.  Man page help & ok jmc@, with & ok djm@

1 files changed, 4 insertions, 9 deletions

diff --git a/usr.bin/ssh/ssh_config.5 b/usr.bin/ssh/ssh_config.5
index 9c7aa4d63ca..a34d2a0d1d9 100644
--- a/usr.bin/ssh/ssh_config.5
+++ b/usr.bin/ssh/ssh_config.5
@@ -33,8 +33,8 @@
 .\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 .\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 .\"
-.\" $OpenBSD: ssh_config.5,v 1.354 2021/06/04 05:10:03 djm Exp $
-.Dd $Mdocdate: June 4 2021 $
+.\" $OpenBSD: ssh_config.5,v 1.355 2021/07/02 05:11:21 dtucker Exp $
+.Dd $Mdocdate: July 2 2021 $
 .Dt SSH_CONFIG 5
 .Os
 .Sh NAME
@@ -412,13 +412,6 @@ Multiple
 .Cm CertificateFile
 directives will add to the list of certificates used for
 authentication.
-.It Cm ChallengeResponseAuthentication
-Specifies whether to use challenge-response authentication.
-The argument to this keyword must be
-.Cm yes
-(the default)
-or
-.Cm no .
 .It Cm CheckHostIP
 If set to
 .Cm yes
@@ -1085,6 +1078,8 @@ The argument to this keyword must be
 (the default)
 or
 .Cm no .
+.Cm ChallengeResponseAuthentication
+is a deprecated alias for this.
 .It Cm KbdInteractiveDevices
 Specifies the list of methods to use in keyboard-interactive authentication.
 Multiple method names must be comma-separated.