MFC everything except the igli-inspired changes to jobs.c and the

.Ox Ns -inspired integer base changes .
That means: bugfixes, plus the new arguments to exec (feature)

jobs.c

@@ -2,7 +2,7 @@
 
 /*-
  * Copyright (c) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2011,
- *		 2012, 2013, 2014
+ *		 2012, 2013, 2014, 2015
  *	Thorsten Glaser <tg@mirbsd.org>
  *
  * Provided that these terms and disclaimer and all copyright notices
@@ -23,7 +23,7 @@
 
 #include "sh.h"
 
-__RCSID("$MirOS: src/bin/mksh/jobs.c,v 1.108 2015/02/20 13:08:28 tg Exp $");
+__RCSID("$MirOS: src/bin/mksh/jobs.c,v 1.109 2015/03/01 15:43:09 tg Exp $");
 
 #if HAVE_KILLPG
 #define mksh_killpg		killpg

mksh.1

@@ -1,4 +1,4 @@
-.\" $MirOS: src/bin/mksh/mksh.1,v 1.349 2015/02/06 10:56:47 tg Exp $
+.\" $MirOS: src/bin/mksh/mksh.1,v 1.350 2015/03/01 15:43:09 tg Exp $
 .\" $OpenBSD: ksh.1,v 1.156 2015/01/16 15:32:32 schwarze Exp $
 .\"-
 .\" Copyright © 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009,
@@ -74,7 +74,7 @@
 .\" with -mandoc, it might implement .Mx itself, but we want to
 .\" use our own definition. And .Dd must come *first*, always.
 .\"
-.Dd $Mdocdate: February 6 2015 $
+.Dd $Mdocdate: March 1 2015 $
 .\"
 .\" Check which macro package we use, and do other -mdoc setup.
 .\"
@@ -6501,7 +6501,7 @@ $ /bin/sleep 666 && echo fubar
 .Ed
 .Pp
 This document attempts to describe
-.Nm mksh\ R51beta
+.Nm mksh\ R50e
 and up,
 compiled without any options impacting functionality, such as
 .Dv MKSH_SMALL ,