Introduce polarssl_zeroize() instead of memset() for zeroization
diff --git a/ChangeLog b/ChangeLog
index 6486ba3..83613b9 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -12,6 +12,8 @@
    * Improvements to tests/Makefile, contributed by Oden Eriksson.
    * Use UTC time to check certificate validity.
    * Reject certificates with times not in UTC, per RFC 5280.
+   * Migrate zeroizing of data to polarssl_zeroize() instead of memset()
+     against unwanted compiler optimizations
 
 Security
    * Forbid change of server certificate during renegotiation to prevent