Log Message:
2.2.0:
- Fix random delays in task execution.
- Calling ``conn.collect()`` multiple times will no longer raise an \ 
``AttributeError`` when no channels exist.
- Fix compatibility code for Python 2.7.6.
- When running in Windows, py-amqp will no longer use the unsupported TCP option \ 
TCP_MAXSEG.
- Added support for setting the SNI hostname header.
- Authentication mechanisms were refactored to be more modular. GSSAPI \ 
authentication is now supported.
- Do not reconnect on collect.