disables any optimization, so it should not be enabled when building
production releases).
+- The leak-detective developer tool has been greatly improved. It works much
+ faster/stabler with multiple threads, does not use deprecated malloc hooks
+ anymore and has been ported to OS X.
+
- chunk_hash() is now based on SipHash-2-4 with a random key. This provides
better distribution and prevents hash flooding attacks when used with
hashtables.