$NetBSD: patch-aj,v 1.4 2013/01/23 17:26:07 wiz Exp $

--- common/options.h.orig	2007-11-19 03:41:42.000000000 +1100
+++ common/options.h
@@ -89,6 +89,7 @@ struct _optlist {
 #define	OPT_NOSET	0x010		/* Option may not be set. */
 #define	OPT_NOUNSET	0x020		/* Option may not be unset. */
 #define	OPT_NOZERO	0x040		/* Option may not be set to 0. */
+#define	OPT_PAIRS	0x080		/* String with even length */
 	u_int8_t flags;
 };