Check in some new vnode man page from FreeBSD. Thanks to Peter Werner

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+.\"     $OpenBSD: vhold.9,v 1.1 2002/02/28 19:22:05 csapuntz Exp $
+.\"
+.\" Copyright (C) 2001 Chad David <davidc@acns.ab.ca>. All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice(s), this list of conditions and the following disclaimer as
+.\"    the first lines of this file unmodified other than the possible
+.\"    addition of one or more copyright notices.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice(s), this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY
+.\" EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+.\" WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+.\" DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE LIABLE FOR ANY
+.\" DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+.\" (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+.\" SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+.\" CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
+.\" DAMAGE.
+.\"
+.\" $FreeBSD: src/share/man/man9/vhold.9,v 1.2 2001/12/14 09:11:13 ru Exp $
+.\"
+.Dd November 21, 2001
+.Dt VHOLD 9
+.Os
+.Sh NAME
+.Nm vhold
+.Nd "acquire a hold on a vnode"
+.Sh SYNOPSIS
+.Fd #include <sys/param.h>
+.Fd #include <sys/vnode.h>
+.Ft void
+.Fn vhold "struct vnode *vp"
+.Sh DESCRIPTION
+The
+.Fn vhold
+function increments the
+.Va v_holdcnt
+of the given vnode.
+If the vnode has already been added to the free list and its v_holdcnt and
+v_usecount are both zero, it will be removed from the free list and
+added to the vnode hold list.
+.Sh SEE ALSO
+.Xr vbusy 9 ,
+.Xr vfree 9
+.Sh AUTHORS
+This man page was orignally written by
+.An Chad David Aq davidc@acns.ab.ca
+for FreeBSD