Daphne

------------------

* ASGI application constructors are now run in a threadpool as they might
contain blocking synchronous code.

------------------

* Removed subprotocol support from server, as it never really worked. Subprotocols
can instead be negotiated by ASGI applications now.

* Non-ASCII query strings now raise a 400 Bad Request error rather than silently
breaking the logger

------------------

* Ping timeouts no longer reset on outgoing data, only incoming data

* No more errors when connections close prematurely

------------------

* Unix socket listening no longer errors during startup (introduced in 2.0.2)

* ASGI Applications are now not immediately killed on disconnection but instead
given --application-close-timeout seconds to exit (defaults to 10)

------------------

* WebSockets are no longer closed after the duration of http_timeout

------------------

* Updated logging to correctly route exceptions through the main Daphne logger