clarify that $ftp_proxy only works for full URLs and can't be used for

interactive connections.

usr.bin/ftp/ftp.1

@@ -1,4 +1,4 @@
-.\" 	$NetBSD: ftp.1,v 1.72 2000/07/28 11:45:12 lukem Exp $
+.\" 	$NetBSD: ftp.1,v 1.73 2000/09/28 12:26:19 lukem Exp $
 .\"
 .\" Copyright (c) 1996-2000 The NetBSD Foundation, Inc.
 .\" All rights reserved.
@@ -68,7 +68,7 @@
 .\"
 .\"	@(#)ftp.1	8.3 (Berkeley) 10/9/94
 .\"
-.Dd July 28, 2000
+.Dd September 28, 2000
 .Dt FTP 1
 .Os
 .Sh NAME
@@ -1446,7 +1446,7 @@ URL, retrieved using the
 protocol if
 .Ic "set ftp_proxy"
 isn't defined.
-Otherwise, transfer using
+Otherwise, transfer the URL using
 .Tn HTTP
 via the proxy defined in
 .Ic "set ftp_proxy" .
@@ -1526,16 +1526,21 @@ is not given, the file is stored in the current directory as the
 of
 .Ar path .
 .Pp
-If a classic format or a
+If a classic format or an
 .Tn FTP
 URL format has a trailing
-.Sq / ,
-then
+.Sq /
+or an empty
+.Ar path
+component, then
 .Nm
 will connect to the site and
 .Ic cd
 to the directory given as the path, and leave the user in interactive
 mode ready for further input.
+This will not work if
+.Ic "set ftp_proxy"
+is being used.
 .Pp
 Direct
 .Tn HTTP