From c416286a1f88ed0eddb78d983068af1a75448e86 Mon Sep 17 00:00:00 2001
From: Gav Wood <i@gavwood.com>
Date: Sat, 25 Jul 2015 20:47:05 +0200
Subject: [PATCH] Introduce vector_ref::cleanse, code adapted from openSSL.
 Introduce secure_vector and bytesSec, make Secret auto-cleansing.