New Features
- Remove support for OpenSSL 1.0.x and below.
- Support range-based 'for' loop for ParallelWork.
Improvements
- Support URLs longer than 2GB bytes.
- Change crc32c module.
- Reject control characters in HTTP header.
- Interface name: create_fdsync_task() -> create_fdatasync_task().
Bug Fixes
- Incorrect 'errno' bug after 'get_connection()' failed.