uptime: Mention libxo support in manual page

MFC after:	3 days
Sponsored by:	Klara, Inc.
Reviewed by:	markj
Differential Revision:	https://reviews.freebsd.org/D52489

(cherry picked from commit 55bd607b9930e5f61219007ad0a81801c8cfdbf3)

2 files changed, 18 insertions, 4 deletions

diff --git a/usr.bin/w/uptime.1 b/usr.bin/w/uptime.1
index 16c16c0b5318..b20e9066a470 100644
--- a/usr.bin/w/uptime.1
+++ b/usr.bin/w/uptime.1
@@ -27,7 +27,7 @@
 .\"
 .\"     @(#)uptime.1	8.2 (Berkeley) 4/18/94
 .\"
-.Dd August 18, 2020
+.Dd September 11, 2025
 .Dt UPTIME 1
 .Os
 .Sh NAME
@@ -35,6 +35,7 @@
 .Nd show how long system has been running
 .Sh SYNOPSIS
 .Nm
+.Op Fl -libxo
 .Sh DESCRIPTION
 The
 .Nm
@@ -42,6 +43,17 @@ utility displays the current time,
 the length of time the system has been up,
 the number of users, and the load average of the system over the last
 1, 5, and 15 minutes.
+.Pp
+The following options are available:
+.Bl -tag -width indent
+.It Fl -libxo
+Generate output via
+.Xr libxo 3
+in a selection of different human and machine readable formats.
+See
+.Xr xo_options 7
+for details on command line arguments.
+.El
 .Sh FILES
 .Bl -tag -width /boot/kernel/kernel
 .It Pa /boot/kernel/kernel
@@ -53,7 +65,9 @@ $ uptime
 11:23AM  up  3:01, 8 users, load averages: 21.09, 15.43, 12.79
 .Ed
 .Sh SEE ALSO
-.Xr w 1
+.Xr w 1 ,
+.Xr libxo 3 ,
+.Xr xo_options 7
 .Sh HISTORY
 The
 .Nm
diff --git a/usr.bin/w/w.1 b/usr.bin/w/w.1
index 7f0d83032d4b..584c5d1b7129 100644
--- a/usr.bin/w/w.1
+++ b/usr.bin/w/w.1
@@ -27,7 +27,7 @@
 .\"
 .\"     @(#)w.1	8.1 (Berkeley) 6/6/93
 .\"
-.Dd August 24, 2020
+.Dd September 11, 2025
 .Dt W 1
 .Os
 .Sh NAME
@@ -56,7 +56,7 @@ user is on, the host from which the user is logged in, the time the user
 logged on, the time since the user last typed anything,
 and the name and arguments of the current process.
 .Pp
-The options are as follows:
+The following options are available:
 .Bl -tag -width indent
 .It Fl -libxo
 Generate output via