Document history

https://www.bell-labs.com/usr/dmr/www/man21.pdf

lib/libc/sys/close.2

@@ -1,4 +1,4 @@
-.\"	$NetBSD: close.2,v 1.17 2004/06/01 16:14:10 kleink Exp $
+.\"	$NetBSD: close.2,v 1.18 2019/09/01 19:20:45 sevan Exp $
 .\"
 .\" Copyright (c) 1980, 1991, 1993, 1994
 .\"	The Regents of the University of California.  All rights reserved.
@@ -29,7 +29,7 @@
 .\"
 .\"     @(#)close.2	8.2 (Berkeley) 4/19/94
 .\"
-.Dd April 19, 1994
+.Dd September 1, 2019
 .Dt CLOSE 2
 .Os
 .Sh NAME
@@ -130,3 +130,8 @@ The
 .Fn close
 function conforms to
 .St -p1003.1-90 .
+.Sh HISTORY
+The
+.Fn close
+function appeared in
+.At v1 .