- update to 3.0.1:
* Bugfix: 'Future exception was never retrieved' warning in
SMTPProtocol after successful connection close and garbage
collection.
* Cleanup: Updated FlowControlMixin logic from stdlib
are keyword only.
* **BREAKING**: Passing ``source_address`` as a string argument
is now an error. ``source_address`` takes a (addr, port)
tuple that is used as the ``local_addr`` param of
``asyncio.create_connection``, allowing for binding
to a specific IP. The ``local_hostname`` argument takes the
value to be sent to the server with the EHLO/HELO message
(which is what ``source_address`` was used for prior to 2.0).
* Change: don't use timeout value passed to ``connect``
everywhere, only for the initial connection
* Change: removed unnecessary connection lost callback
* Change: revised handling for 'Future exception was never
retrieved' warnings in protocol

- Update to v2.0.0
- remove failing_smtpd_tests.patch: not needed
* Fix SMTPNotSupported error with UTF8 sender/recipient names