Changelog:
===========
- Use bytearray for request body accumulation to avoid O(n^2) allocation on fragmented bodies
- Escape brackets and backslash in httptools HEADER_RE regex
- Fix multiple issues in websockets sans-io implementation
Signed-off-by: Wang Mingyu <wangmy@fujitsu.com>
Signed-off-by: Khem Raj <khem.raj@oss.qualcomm.com>
