From d511702b8ddc74bcf1255aee7ff426737a055068 Mon Sep 17 00:00:00 2001
From: Gordon Bergling <gbe@FreeBSD.org>
Date: Fri, 17 Jul 2020 21:55:24 +0000
Subject: [PATCH] mount_nfs(8): document alternate form of the gssname option

PR:		238506
Submitted by:	Greg Veldman <freebsd at gregv dot net>
Reviewed by:	0mp, bcr (mentor)
Approved by:	bcr (mentor)
MFC after:	1 week
Differential Revision:	https://reviews.freebsd.org/D25667
---
 sbin/mount_nfs/mount_nfs.8 | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/sbin/mount_nfs/mount_nfs.8 b/sbin/mount_nfs/mount_nfs.8
index 49ddb5276a50..f0949c5dfe02 100644
--- a/sbin/mount_nfs/mount_nfs.8
+++ b/sbin/mount_nfs/mount_nfs.8
@@ -159,7 +159,16 @@ should be specified without instance or domain and is typically
 .Dq "host" ,
 .Dq "nfs"
 or
-.Dq "root" .
+.Dq "root" ,
+although the form
+.Sm off
+.Aq Ar service
+@
+.Aq Ar fqdn
+.Sm on
+can also be used if the local system's
+.Xr gethostname 3
+value does not match the host-based principal in the keytab.
 .It Cm hard
 Same as not specifying
 .Cm soft .