some fixups for mksh

ksh.1tbl

@@ -1,4 +1,4 @@
-.\" $MirBSD: ksh.1tbl,v 1.31 2004/10/28 15:07:35 tg Exp $
+.\" $MirBSD: ksh.1tbl,v 1.32 2004/10/28 16:19:01 tg Exp $
 .\" $OpenBSD: ksh.1tbl,v 1.72 2004/08/07 16:46:58 millert Exp $
 .\"
 .\" Copyright (c) 1980, 1990, 1993
@@ -32,6 +32,20 @@
 .\"
 .\"     @(#)ksh.1tbl      8.2 (Berkeley) 8/19/96
 .\"
+.\" define Mx macro for portable mksh
+.de Mx
+.nr cF \\n(.f
+.nr cZ \\n(.s
+.ds aa \&\f\\n(cF\s\\n(cZ
+.if \\n(aC==0 \{\
+.	if \\n(.$==0 \&MirOS\\*(aa
+.\}
+.if \\n(.$==1 \{\
+.	if "\\$1"6"  \&MirOS #6\\*(aa
+.	if "\\$1"."  \&MirOS\\$1\\*(aa
+.	if "\\$1","  \&MirOS\\$1\\*(aa
+.\}
+..
 .Dd April 7, 2004
 .Dt KSH 1
 .Os
@@ -5217,6 +5231,15 @@ extensions exposed, caution should be used where backwards compatibility with
 traditional Bourne or
 .Tn POSIX
 compliant shells is an issue.
+.pp
+.Nm mksh
+is the common name for the
+.Mx
+Korn shell installed in
+.Pa /bin/mksh
+or
+.Pa /usr/local/bin/mksh
+on foreign systems, installed from the portable mirbsdksh sources.
 .Sh AUTHORS
 This shell is based on the public domain 7th edition Bourne shell clone by
 Charles Forsyth and parts of the BRL shell by Doug A. Gwyn, Doug Kingston,