$NetBSD: patch-mksh.1,v 1.10 2017/04/13 14:36:46 bsiegert Exp $

Kill the .Dt override and restore installation a normal man page.
--- mksh.1.orig	2015-04-30 21:14:33.000000000 +0000
+++ mksh.1
@@ -60,21 +60,11 @@
 .	ds en \(em
 .\}
 .\"
-.\" Implement .Dd with the Mdocdate RCS keyword
-.\"
-.rn Dd xD
-.de Dd
-.ie \\$1$Mdocdate: \{\
-.	xD \\$2 \\$3, \\$4
-.\}
-.el .xD \\$1 \\$2 \\$3 \\$4 \\$5 \\$6 \\$7 \\$8
-..
-.\"
 .\" .Dd must come before definition of .Mx, because when called
 .\" with -mandoc, it might implement .Mx itself, but we want to
 .\" use our own definition. And .Dd must come *first*, always.
 .\"
-.Dd $Mdocdate: April 12 2017 $
+.Dd April 12 2017 $
 .\"
 .\" Check which macro package we use, and do other -mdoc setup.
 .\"