Log Message:
py-twisted: update to 17.9.0

Twisted 17.9.0:

Features
--------
- twisted.python.failure.Failure is now a new-style class which subclasses
  BaseException.
- twisted.internet.posixbase.PosixReactorBase.adoptStreamPort and
  twisted.internet.posixbase.PosixReactorBase.adoptStreamConnection now support
  AF_UNIX SOCK_STREAM sockets.
-
- t.protocol.policies.TimeoutMixin.setTimeout and
  t.protocol.policies.TimeoutProtocol.cancelTimeout (used in
  t.protocol.policies.TimeoutFactory) no longer raise a
  t.internet.error.AlreadyCancelled exception when calling them for an already
  cancelled timeout.
- twisted.web.template.flatten now supports coroutines that yield Deferreds.

- twisted.web.client.HTTPConnectionPool passes the repr() of the endpoint to
  the client protocol factory, and the protocol factory adds that to its own
  repr(). This makes logs more useful.
- Python 3.6 is now supported

Bugfixes
--------
- twisted.python.logfile.BaseLogFile and subclasses now always open the file in
  binary mode, and will process text as UTF-8.
- The `ssl:` endpoint now accepts `certKey` PEM files without trailing
  newlines.
- Logger.__init__ sets the namespace to "<unknown>" instead of \ 
raising KeyError
  when unable to determine the namespace from the calling context.
- twisted.internet._win32serialport updated to support pySerial 3.x and dropped
  pySerial 2.x support.
- twisted.python.rebuild now works on Python 3.
- twisted.web.server.Request.notifyFinish will now once again promptly notify
  applications of client disconnection (assuming that the client doesn't send a
  large amount of pipelined request data) rather than waiting for the timeout;
  this fixes a bug introduced in Twisted 16.3.0.
- twisted.web.guard.HTTPAuthSessionWrapper configured with
  DigestCredentialFactory now works on both Python 2 and 3.
- Detect when we’re being run using “-m twisted” or “-m twisted.trial” \ 
and use
  it to build an accurate usage message.
- twisted.protocols.tls.TLSMemoryBIOProtocol now allows unregisterProducer to
  be called when no producer is registered, bringing it in line with other
  transports.
- twisted.web web servers no longer print tracebacks when they timeout clients
  that do not respond to TLS CLOSE_NOTIFY messages.
- twisted.mail.imap4 now works on Python 3.
- twisted.python.shortcut now works on Python 3 in Windows.
- Fix traceback forwarding with inlineCallbacks on python 3.
- twisted.mail.imap4.MessageSet now treats * as larger than every message ID,
  leading to more consistent and robust behavior.
- The following plugins can now be used on Python 3 with twistd: dns, inetd,
  portforward, procmon, socks, and words.
- twisted.internet._win32serialport now uses serial.serialutil.to_bytes() to
  provide bytes in Python 3.
- twisted.internet.reactor.spawnProcess() now does not fail on Python 3 in
  Windows if passed a bytes-encoded path argument.
- twisted.protocols.ident now works on Python 3.
- Ignore PyPy's implementation differences in base object class.
- twisted.python.test.test_setup now passes with setuptools 36.2.1
- twisted.internet._win32serialport SerialPort._clearCommError() no longer
  raises AttributeError
- twisted.trial.unittest.SynchronousTestCase and
  twisted.trial.unittest.TestCase now always run their tearDown methods, even
  when a test method fails with an exception. They also flush all errors logged
  by a test method before running another, ensuring the logged errors are
  associated with their originating test method.