fhstatvfs(2) isn't in NetBSD 2.1 but 3.0.

lib/libc/sys/fhopen.2

@@ -1,4 +1,4 @@
-.\"	$NetBSD: fhopen.2,v 1.12 2004/05/13 10:20:58 wiz Exp $
+.\"	$NetBSD: fhopen.2,v 1.13 2006/05/19 17:57:37 tsutsui Exp $
 .\"
 .\" Copyright (c) 1999 National Aeronautics & Space Administration
 .\" All rights reserved.
@@ -31,7 +31,7 @@
 .\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 .\" POSSIBILITY OF SUCH DAMAGE.
 .\"/
-.Dd April 14, 2004
+.Dd May 19, 2006
 .Dt FHOPEN 2
 .Os
 .Sh NAME
@@ -143,4 +143,4 @@ The
 function replaced
 .Fn fhstatfs
 in
-.Nx 2.1 .
+.Nx 3.0 .