upstream: allow auto-incrementing certificate serial number for certs

signed in a single commandline.

OpenBSD-Commit-ID: 39881087641efb8cd83c7ec13b9c98280633f45b

1 files changed, 8 insertions, 2 deletions

diff --git a/ssh-keygen.1 b/ssh-keygen.1
index 474f4294a..0c284a295 100644
--- a/ssh-keygen.1
+++ b/ssh-keygen.1
@@ -1,4 +1,4 @@
-.\"     $OpenBSD: ssh-keygen.1,v 1.155 2019/01/22 11:40:42 djm Exp $
+.\"     $OpenBSD: ssh-keygen.1,v 1.156 2019/01/23 04:51:02 djm Exp $
 .\"
 .\" Author: Tatu Ylonen <ylo@cs.hut.fi>
 .\" Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@@ -35,7 +35,7 @@
 .\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 .\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 .\"
-.Dd $Mdocdate: January 22 2019 $
+.Dd $Mdocdate: January 23 2019 $
 .Dt SSH-KEYGEN 1
 .Os
 .Sh NAME
@@ -640,6 +640,12 @@ OpenSSH format file and print an OpenSSH public key to stdout.
 .It Fl z Ar serial_number
 Specifies a serial number to be embedded in the certificate to distinguish
 this certificate from others from the same CA.
+If the
+.Ar serial_number
+is prefixed with a
+.Sq +
+character, then the serial number will be incremented for each certificate
+signed on a single command-line.
 The default serial number is zero.
 .Pp
 When generating a KRL, the