Add RCS Id, bump date for when it appeared in NetBSD, mention

NetBSD appearance in HISTORY section, fmt a paragraph.

usr.bin/extattr/getextattr.1

@@ -1,3 +1,5 @@
+.\"	$NetBSD: getextattr.1,v 1.2 2005/01/02 18:41:23 wiz Exp $
+.\"
 .\"-
 .\" Copyright (c) 2000, 2001 Robert N. M. Watson
 .\" Copyright (c) 2002 Networks Associates Technology, Inc.
@@ -31,7 +33,7 @@
 .\"
 .\" $FreeBSD: src/usr.sbin/extattr/rmextattr.8,v 1.4 2003/02/24 22:53:25 ru Exp $
 .\"
-.Dd August 30, 2000
+.Dd January 2, 2005
 .Dt RMEXTATTR 8
 .Os
 .Sh NAME
@@ -62,10 +64,8 @@
 .Ar attrvalue
 .Ar filename ...
 .Sh DESCRIPTION
-These
-utilities
-are user tools to manipulate the named extended attributes on files and
-directories.
+These utilities are user tools to manipulate the named extended
+attributes on files and directories.
 The
 .Ar attrnamespace
 argument should be the namespace of the attribute to retrieve: legal
@@ -123,7 +123,9 @@ Extended attribute support was developed as part of the
 .Tn TrustedBSD
 Project,
 and introduced in
-.Fx 5.0 .
+.Fx 5.0
+and
+.Nx 3.0 .
 It was developed to support security extensions requiring additional labels
 to be associated with each file or directory.
 .Sh AUTHORS