Major changes between OpenSSL 1.0.2g and OpenSSL 1.1.0 [in pre-release]
+ o Added support for "pipelining"
+ o Added the AFALG engine
o New threading API implemented
o Support for ChaCha20 and Poly1305 added to libcrypto and libssl
o Support for extended master secret
o Extended SSL_CONF support using configuration files
o KDF algorithm support. Implement TLS PRF as a KDF.
o Support for Certificate Transparency
+ o HKDF support.
Major changes between OpenSSL 1.0.2f and OpenSSL 1.0.2g [1 Mar 2016]