Daphne

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* Endpoint unicode strings now work correctly on Python 2 and Python 3

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* BREAKING CHANGE: Daphne now requires acceptance of WebSocket connections
before it finishes the socket handshake and relays incoming packets.
You must upgrade to at least Channels 1.0.0 as well; see
http://channels.readthedocs.io/en/latest/releases/1.0.0.html for more.

* http.disconnect now has a `path` key

* WebSockets can now be closed with a specific code

* X-Forwarded-For header support; defaults to X-Forwarded-For, override with
--proxy-headers on the commandline.

* Twisted endpoint description string support with `-e` on the command line
(allowing for SNI/ACME support, among other things)

* Logging/error verbosity fixes and access log flushes properly

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* Connections now force-close themselves after pings fail for a certain
timeframe, controllable via the new --ping-timeout option.

* Badly-formatted websocket response messages now log to console in
all situations

* Compatability with Twisted 16.3 and up

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* File descriptors can now be passed on the commandline for process managers
that pass sockets along like this.

* websocket.disconnect messages now come with a "code" attribute matching the
WebSocket spec.

* A memory leak in request logging has been fixed.

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* Marked as incompatible with twisted 16.3 and above until we work out why
it stops incoming websocket messages working

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* Consumption of websocket.receive is also now required.