Summarized Changelog:
- Now userspace PRNG objects (such as AutoSeeded_RNG and HMAC_DRBG) use an internal lock, which allows safe concurrent use
- DL_Group and EC_Group objects now track if they were created from a known trusted group
- Support OCSP responders that live on a non-standard port
- Fix a bug in EAX which allowed requesting a 0 length tag, which had the effect of using a full length tag
- Fix a memory leak in GCM