Log Message:
Updated py-twisted to 16.6.0.

Twisted Core 16.6.0 (2016-11-17)
================================

Features
--------
 - The twist script can now be run by invoking python -m twisted.
   (#8657)
 - twisted.protocols.sip has been ported to Python 3. (#8669)
 - twisted.persisted.dirdbm has been ported to Python 3. (#8888)

Bugfixes
--------
 - twisted.internet.defer.Deferred now implements send, not __send__,
   which means that it is now a conforming generator. (#8861)
 - The IOCP reactor no longer transmits the contents of uninitialized
   memory when writing large amounts of data. (#8870)
 - Deferreds awaited/yielded from in a
   twisted.internet.defer.ensureDeferred wrapped coroutine will now
   properly raise exceptions. Additionally, it more closely models
   asyncio.ensure_future and will pass through Deferreds. (#8878)
 - Deferreds that are paused or chained on other Deferreds will now
   return a result when yielded/awaited in a twisted.internet.defer
   .ensureDeferred-wrapped coroutine, instead of returning the
   Deferred it was chained to. (#8890)

Improved Documentation
----------------------
 - twisted.test.proto_helpers is now explicitly covered by the
   compatibility policy. (#8857)

Other
-----
 - #8281, #8823, #8862

Twisted Conch 16.6.0 (2016-11-17)
=================================

Features
--------
 - twisted.conch.ssh.keys supports ECDSA keys (#8798)
 - scripts/ckeygen can now generate ecdsa keys. (#8828)
 - ckeygen has been ported to Python 3 (#8855)

Deprecations and Removals
-------------------------
 - twisted.conch.ssh no longer uses gmpy, if available. gmpy is
   unmaintained, does not have binary wheels for any platforms, and an
   alternative for higher performance is available in the form of
   PyPy. (#8079)

Twisted Web 16.6.0 (2016-11-17)
===============================

Features
--------
 - twisted.web.server.Site's HTTP/2 server support now emits vastly
   fewer WINDOW_UPDATE frames than previously. (#8681)

Bugfixes
--------
 - twisted.web.Agent now tolerates receiving unexpected status codes
   in the 100 range by discarding them, which is what RFC 7231
   recommends doing. (#8885)
 - twisted.web._http.H2Stream's getHost and getPeer implementations
   now actually return the host and peer instead of None. (#8893)

Twisted Words 16.6.0 (2016-11-17)
=================================

Features
--------
 - twisted.words.protocols.irc has been ported to Python 3 (#6320)