Document a couple of missing "set" options, mostly borrowing language

from vi.ref, and explain how to set "escapetime" to work-around the problem
described in PR 8277. This should close PR 8277.

usr.bin/vi/docs/USD.doc/vi.man/vi.1

@@ -1,4 +1,4 @@
-.\"	$NetBSD: vi.1,v 1.7 2002/02/08 01:36:37 ross Exp $
+.\"	$NetBSD: vi.1,v 1.8 2002/05/02 14:20:01 fredb Exp $
 .\"
 .\" Copyright (c) 1994
 .\"     The Regents of the University of California.  All rights reserved.
@@ -1107,6 +1107,18 @@ command.
 only.
 Announce error messages with a bell.
 .TP
+.B "escapetime [1]"
+The 10th's of a second
+.I ex/vi
+waits for a subsequent key to complete an
+\*[Lt]escape\*[Gt]
+key mapping.
+Over a link with high latency,
+the default may cause arrow and function keys
+to introduce artifacts.
+If that's the case,
+try increasing this to a value between 3 and 6.
+.TP
 .B "exrc, ex [off]"
 Read the startup files in the local directory.
 .TP
@@ -1189,6 +1201,12 @@ commands.
 .tr Q"
 .ds ms noprint [QQ]
 .TP
+.B "msgcat [./]"
+This option selects a message catalog to be used to display error and
+informational messages in a specified language.
+If the value of this option ends with a '/', it is treated as the name
+of a directory that contains a message catalog
+.TP
 .B "\*(ms"
 .tr QQ
 Characters that are never handled as printable characters.