Eventlet

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* green.threading: current_thread() did not see new monkey-patched threads; Thanks to Jake Tesler
* tpool: exception in tpool-ed call leaked memory via backtrace
* wsgi: latin-1 encoding dance for environ[PATH_INFO]

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* Fixed issue installing excess enum34 on Python3.4+ (rebuild with updated setuptools)
* event: Event.wait() timeout=None argument to be compatible with upstream CPython
* greendns: Treat /etc/hosts entries case-insensitive; Thanks to Ralf Haferkamp

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* convenience: (SO_REUSEPORT) socket.error is not OSError on Python 2; Thanks to JacoFouriegithub
* convenience: SO_REUSEPORT is not available on WSL platform (Linux on Windows)
* convenience: skip SO_REUSEPORT for bind on random port (0)
* dns: reading /etc/hosts raised DeprecationWarning for universal lines on Python 3.4+; Thanks to Chris Kerr
* green.openssl: Drop OpenSSL.rand support; Thanks to Haikel Guemar
* green.subprocess: keep CalledProcessError identity; Thanks to Linbinggithub
* greendns: be explicit about expecting bytes from sock.recv; Thanks to Matt Bennett
* greendns: early socket.timeout was breaking IO retry loops
* GreenSocket.accept does not notify_open; Thanks to orishoshan
* patcher: set locked RLocks' owner only when patching existing locks; Thanks to Quan Tian
* patcher: workaround for monotonic "no suitable implementation"; Thanks to Geoffrey Thomas
* queue: empty except was catching too much
* socket: context manager support; Thanks to Miguel Grinberg
* support: update monotonic 1.3 (5c0322dc559bf)
* support: upgrade bundled dnspython to 1.16.0 (22e9de1d7957e) https://github.com/eventlet/eventlet/issues/427
* websocket: fd leak when client did not close connection properly; Thanks to Konstantin Enchant
* websocket: support permessage-deflate extension; Thanks to Costas Christofi and Peter Kovary
* wsgi: close idle connections (also applies to websockets)
* wsgi: deprecated options are one step closer to removal
* wsgi: handle remote connection resets; Thanks to Stefan Nica

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* New timeout error API: .is_timeout=True on exception object
It's now easy to test if network error is transient and retry is appropriate.
Please spread the word and invite other libraries to support this interface.
* hubs: use monotonic clock by default (bundled package); Thanks to Roman Podoliaka and Victor Stinner
* dns: EVENTLET_NO_GREENDNS option is back, green is still default
* dns: hosts file was consulted after nameservers
* ssl: RecursionError on Python3.6+; Thanks to justdoit0823github and Gevent developers
* wsgi: log_output=False was not disabling startup and accepted messages
* greenio: Fixed OSError: [WinError 10038] Socket operation on nonsocket
* dns: EAI_NODATA was removed from RFC3493 and FreeBSD
* green.select: fix mark_as_closed() wrong number of args
* green.zmq: socket.{recv,send}_* signatures did not match recent upstream pyzmq
* New feature: Add zipkin tracing to eventlet
* db_pool: proxy Connection.set_isolation_level()
* green.zmq: support RCVTIMEO (receive timeout)
* green.profile: Python3 compatibility; Thanks to Artur Stawiarski
* support: upgrade bundled six to 1.10 (dbfbfc818e3d)
* python3.6: http.client.request support chunked_encoding

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* dns: try unqualified queries as top level
* test_import_patched_defaults bended to play with pyopenssl>=16.1.0
* Explicit environ flag for importing eventlet.__version__ without ignoring import errors
* Type check Semaphore, GreenPool arguments; Thanks to Matthew D. Pagel

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* IMPORTANT: removed select.poll() function
* DNS resolving is always green with dnspython bundled in
* greenio: only trampoline when we block
* convenience: listen() sets SO_REUSEPORT when available; Thanks to Zhengwei Gao
* ssl: Fix "TypeError: read() argument 2 must be read-write bytes-like object, not None"
* greenio: _recv_loop behaviour with recv_into on closed sock
* ipv6: getaddrinfo would fail with scope index
* green.zmq: Support {send,recv}_{string,json,pyobj} wrappers
* greendns: Return answers from /etc/hosts despite nameserver errors
* patcher: fixed green existing locks fail (Python3)
* Add DAGPool, a dependency-driven greenthread pool
* wsgi: Unix socket address representation; Thanks to Samuel Merritt
* tpool: isolate internal socket from default timeout; Thanks to Alex Villacís Lasso
* wsgi: only skip Content-Type and Content-Length headers (GH-327)
* wsgi: 400 on blank Content-Length headers (GH-334)
* greenio: makefile related pypy socket ref counting
* ssl: Fix recv_into blocking when reading chunks of data
* websocket: support Gunicorn environ['gunicorn.socket']