upstream: Clarify language about moduli. While both ends of the

connection do need to use the same parameters (ie groups), the DH-GEX
protocol takes care of that and both ends do not need the same contents in
the moduli file, which is what the previous text suggested.  ok djm@ jmc@

OpenBSD-Commit-ID: f0c18cc8e79c2fbf537a432a9070ed94e96a622a

ssh-keygen.1

@@ -1,4 +1,4 @@
-.\"	$OpenBSD: ssh-keygen.1,v 1.212 2020/11/27 10:12:30 dtucker Exp $
+.\"	$OpenBSD: ssh-keygen.1,v 1.213 2021/05/12 11:34:30 dtucker 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: November 27 2020 $
+.Dd $Mdocdate: May 12 2021 $
 .Dt SSH-KEYGEN 1
 .Os
 .Sh NAME
@@ -816,8 +816,7 @@ Valid generator values are 2, 3, and 5.
 .Pp
 Screened DH groups may be installed in
 .Pa /etc/moduli .
-It is important that this file contains moduli of a range of bit lengths and
-that both ends of a connection share common moduli.
+It is important that this file contains moduli of a range of bit lengths.
 .Pp
 A number of options are available for moduli generation and screening via the
 .Fl O