+.It Cm GSSAPIAuthentication
+Specifies whether authentication based on GSSAPI may be used, either using
+the result of a successful key exchange, or using GSSAPI user
+authentication.
+The default is
+.Dq yes .
+Note that this option applies to protocol version 2 only.
+.It Cm GSSAPIDelegateCredentials
+Forward (delegate) credentials to the server.
+The default is
+.Dq no .
+Note that this option applies to protocol version 2 only.