10473 zfs(1M) missing cross-reference to zfs-program(1M)

Reviewed by: Toomas Soome <tsoome@me.com>
Reviewed by: Andy Fiddaman <andy@omniosce.org>
Reviewed by: Peter Tribble <peter.tribble@gmail.com>
Reviewed by: Gergő Mihály Doma <domag02@gmail.com>
Approved by: Dan McDonald <danmcd@joyent.com>

usr/src/man/man1m/zfs.1m

@@ -23,14 +23,13 @@
 .\" Copyright 2011 Joshua M. Clulow <josh@sysmgr.org>
 .\" Copyright (c) 2011, 2016 by Delphix. All rights reserved.
 .\" Copyright (c) 2013 by Saso Kiselkov. All rights reserved.
-.\" Copyright (c) 2014, Joyent, Inc. All rights reserved.
 .\" Copyright (c) 2014 by Adam Stevko. All rights reserved.
 .\" Copyright (c) 2014 Integros [integros.com]
 .\" Copyright 2018 Nexenta Systems, Inc.
-.\" Copyright 2018 Joyent, Inc.
+.\" Copyright 2019 Joyent, Inc.
 .\" Copyright (c) 2018 Datto Inc.
 .\"
-.Dd Jan 05, 2019
+.Dd February 26, 2019
 .Dt ZFS 1M
 .Os
 .Sh NAME
@@ -3496,6 +3495,7 @@ Channel programs may only be run with root privileges.
 .sp
 For full documentation of the ZFS channel program interface, see the manual
 page for
+.Xr zfs-program 1M .
 .Bl -tag -width ""
 .It Fl j
 Display channel program output in JSON format.
@@ -3921,6 +3921,7 @@ M       F       /tank/test/modified
 .Xr share 1M ,
 .Xr sharemgr 1M ,
 .Xr unshare 1M ,
+.Xr zfs-program 1M ,
 .Xr zonecfg 1M ,
 .Xr zpool 1M ,
 .Xr chmod 2 ,