upstream: Add ssh -Q key-sig for all key and signature types.

Teach ssh -Q to accept ssh_config(5) and sshd_config(5) algorithm keywords as
an alias for the corresponding query.  Man page help jmc@, ok djm@.

OpenBSD-Commit-ID: 1e110aee3db2fc4bc5bee2d893b7128fd622e0f8

1 files changed, 10 insertions, 2 deletions

diff --git a/ssh.1 b/ssh.1
index 971337520..60de6087a 100644
--- a/ssh.1
+++ b/ssh.1
@@ -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.1,v 1.409 2019/12/21 20:22:34 naddy Exp $
-.Dd $Mdocdate: December 21 2019 $
+.\" $OpenBSD: ssh.1,v 1.410 2020/02/07 03:54:44 dtucker Exp $
+.Dd $Mdocdate: February 7 2020 $
 .Dt SSH 1
 .Os
 .Sh NAME
@@ -585,10 +585,18 @@ flag),
 (certificate key types),
 .Ar key-plain
 (non-certificate key types),
+.Ar key-sig
+(all key types and signature algorithms),
 .Ar protocol-version
 (supported SSH protocol versions), and
 .Ar sig
 (supported signature algorithms).
+Alternatively, any keyword from
+.Xr ssh_config 5
+or
+.Xr sshd_config 5
+that takes an algorithm list may be used as an alias for the corresponding
+query_option.
 .Pp
 .It Fl q
 Quiet mode.