-c: make it clear where the file hierarchy starts

-I, -E: they also work with -C, not just with -D

usr.sbin/mtree/mtree.8

@@ -1,4 +1,4 @@
-.\"	$NetBSD: mtree.8,v 1.45 2008/05/02 18:11:06 martin Exp $
+.\"	$NetBSD: mtree.8,v 1.46 2009/02/01 22:37:22 hubertf Exp $
 .\"
 .\" Copyright (c) 1989, 1990, 1993
 .\"	The Regents of the University of California.  All rights reserved.
@@ -56,7 +56,7 @@
 .\"
 .\"     @(#)mtree.8	8.2 (Berkeley) 12/11/93
 .\"
-.Dd September 12, 2006
+.Dd February 1, 2009
 .Dt MTREE 8
 .Os
 .Sh NAME
@@ -110,7 +110,8 @@ missing from either the file hierarchy or the specification.
 The options are as follows:
 .Bl -tag -width flag
 .It Fl c
-Print a specification for the file hierarchy to the standard output.
+Print a specification for the file hierarchy originating at
+the current working directory to the standard output.
 .It Fl d
 Ignore everything except directory type files.
 .It Fl C
@@ -140,6 +141,8 @@ Add the comma separated tags to the
 .Dq exclusion
 list.
 Non-directories with tags which are in the exclusion list are not printed with
+.Fl C
+and
 .Fl D .
 .It Fl e
 Don't complain about files that are in the file hierarchy, but not in the
@@ -153,6 +156,8 @@ Add the comma separated tags to the
 .Dq inclusion
 list.
 Non-directories with tags which are in the inclusion list are printed with
+.Fl C
+and
 .Fl D .
 If no inclusion list is provided, the default is to display all files.
 .It Fl i