J/j is a three valued option, document and fix code to actuall support that

with a little help from jmc@ for the man page bits
ok jca@  and a reluctant tedu@

1 files changed, 5 insertions, 3 deletions

diff --git a/src/lib/libc/stdlib/malloc.c b/src/lib/libc/stdlib/malloc.c
index 678c782d20..b4c0010f35 100644
--- a/src/lib/libc/stdlib/malloc.c
+++ b/src/lib/libc/stdlib/malloc.c
@@ -1,4 +1,4 @@
-/*      $OpenBSD: malloc.c,v 1.191 2016/06/30 09:00:48 otto Exp $       */
+/*      $OpenBSD: malloc.c,v 1.192 2016/07/06 20:32:02 otto Exp $       */
 /*
  * Copyright (c) 2008, 2010, 2011 Otto Moerbeek <otto@drijf.net>
  * Copyright (c) 2012 Matthew Dempsky <matthew@openbsd.org>
@@ -533,10 +533,12 @@ omalloc_parseopt(char opt)
                 mopts.malloc_hint = 1;
                 break;
         case 'j':
-                mopts.malloc_junk = 0;
+                if (mopts.malloc_junk > 0)
+                        mopts.malloc_junk--;
                 break;
         case 'J':
-                mopts.malloc_junk = 2;
+                if (mopts.malloc_junk < 2)
+                        mopts.malloc_junk++;
                 break;
         case 'n':
         case 'N':