Daphne

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* Access logging in NCSAish format now printed to stdout, configurable to
another file using --access-log=filename

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* WebSockets now close after they've been open for longer than the channel
layer group expiry (86400 seconds by default for most layers).

* Binding to UNIX sockets is now possible (use the -u argument)

* WebSockets now send keepalive pings if they've had no data for a certain
amount of time (20 seconds by default, set with --ping-interval)

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* Multiple cookies are now set correctly

* Follows new ASGI single-response-channel spec for !

* Follows new ASGI header encoding spec for HTTP

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* WebSocket query strings are correctly encoded

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* HTTP requests now time out after a configurable amount of time and return 503
(default is 2 minutes)

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* Main thread actually idles rather than sitting at 100%

* WebSocket packets have an "order" attribute attached

* WebSocket upgrade header detection is now case insensitive