1. Smaller SSH code.
2. Added support to get LATM-based MPEG-4 Audio file via Darwin/QuickTime Streaming Server.
3. Modified CONNECT method to promote successful chance to record streaming via RTMP.
4. Fixed a crash bug while BT task was uploading.
5. Improved the upload transfer rate for BT.
6. Most socket connections were changed from non-blocking mode to blocking mode to improve transfer performance.
