smbutil(1): Reference nsmb.conf(5) and mount_smbfs(8)

Reviewed by:	bcr
Approved by:    krion (mentor, implicit), mat (mentor, implicit)
MFC after:	1 week
Differential Revision:	https://reviews.freebsd.org/D17809

contrib/smbfs/smbutil/smbutil.1

@@ -1,5 +1,5 @@
 .\" $Id: smbutil.1,v 1.5 2002/04/16 02:48:16 bp Exp $
-.Dd February 14, 2000
+.Dd November 1, 2018
 .Dt SMBUTIL 1
 .Os
 .Sh NAME
@@ -127,6 +127,9 @@ See
 .Pa ./examples/dot.nsmbrc
 for details.
 .El
+.Sh SEE ALSO
+.Xr nsmb.conf 5 ,
+.Xr mount_smbfs 8
 .Sh AUTHORS
 .An Boris Popov Aq bp@butya.kz ,
 .Aq bp@FreeBSD.org