unbreak tree: add VIS_HEX and VIS_ALL flags

src/include/vis.h

@@ -1,4 +1,4 @@
-/*	$OpenBSD: vis.h,v 1.11 2005/08/09 19:38:31 millert Exp $	*/
+/*	$OpenBSD: vis.h,v 1.12 2010/08/23 02:07:50 djm Exp $	*/
 /*	$NetBSD: vis.h,v 1.4 1994/10/26 00:56:41 cgd Exp $	*/
 
 /*-
@@ -40,6 +40,7 @@
  */
 #define	VIS_OCTAL	0x01	/* use octal \ddd format */
 #define	VIS_CSTYLE	0x02	/* use \[nrft0..] where appropriate */
+#define	VIS_HEX		0x200	/* use hex \xdd format */
 
 /*
  * to alter set of characters encoded (default is to encode all
@@ -50,6 +51,7 @@
 #define	VIS_NL		0x10	/* also encode newline */
 #define	VIS_WHITE	(VIS_SP | VIS_TAB | VIS_NL)
 #define	VIS_SAFE	0x20	/* only encode "unsafe" characters */
+#define	VIS_ALL		0x400	/* encode all characters */
 
 /*
  * other