Feature enhancements
- Added SSL_MODE_RELEASE_BUFFERS to save memory on idle SSL connections.
- Removed http/1.0 from SPDY NPN String.
- Updated MIME configurations based on user feedback.
- Added SSLContext::setSessionCacheSize(), SSLContext::setSession timeout and updated default ssl session timeout to 100800, default cache size to 40K.
- Updated configure.ac to avoid malloc() replacement issue on some systems.
- Make sure connection keepalive is not used for SPDY.
- Fixed bug: SPDY stream kept open resulting in a growing number of SSL connections.