upstream: tweak the Nd lines for a bit of consistency; ok markus

OpenBSD-Commit-ID: 876651bdde06bc1e72dd4bd7ad599f42a6ce5a16
diff --git a/ssh-keyscan.1 b/ssh-keyscan.1
index f3d7a40..f9df75d 100644
--- a/ssh-keyscan.1
+++ b/ssh-keyscan.1
@@ -1,4 +1,4 @@
-.\"	$OpenBSD: ssh-keyscan.1,v 1.44 2018/03/05 07:03:18 jmc Exp $
+.\"	$OpenBSD: ssh-keyscan.1,v 1.45 2019/11/30 07:07:59 jmc Exp $
 .\"
 .\" Copyright 1995, 1996 by David Mazieres <dm@lcs.mit.edu>.
 .\"
@@ -6,12 +6,12 @@
 .\" permitted provided that due credit is given to the author and the
 .\" OpenBSD project by leaving this copyright notice intact.
 .\"
-.Dd $Mdocdate: March 5 2018 $
+.Dd $Mdocdate: November 30 2019 $
 .Dt SSH-KEYSCAN 1
 .Os
 .Sh NAME
 .Nm ssh-keyscan
-.Nd gather SSH public keys
+.Nd gather SSH public keys from servers
 .Sh SYNOPSIS
 .Nm ssh-keyscan
 .Op Fl 46cDHv