Hypercorn

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* Bugfix cope with a None loop argument to run_single.
* Add a new logo.

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* Bugfix ensure the event-loop is configured before the app is
created.
* Bugfix import error on windows systems.

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* Add ability to specify a file logging target.
* Support serving on a unix domain socket or a file descriptor.
* Alter keep alive timeout to require a request to be considered
active (rather than just data). This mitigates a HTTP/2 DOS attack.
* Improve the SSL configuration, including NPN protocols, compression
suppression, and disallowed SSL versions for HTTP/2.
* Allow the h2 max inbound frame size to be configured.
* Add a PID file to be specified and used.
* Upgrade to the latest wsproto and h11 libraries.
* Bugfix propagate TERM signal to workers.
* Bugfix ensure hosting information is printed when running from the
command line.

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* Bugfix don't force the ALPN protocols
* Bugfix shutdown on reload
* Bugfix set the default log level if std(out/err) is used
* Bugfix HTTP/1.1 -> HTTP/2 Upgrade requests
* Bugfix correctly handle TERM and INT signals
* Bugix loop usage and creation for multiple workers

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* Bugfix setting ssl from config files
* Bugfix ensure modules aren't set as config values
* Bugfix use the wsgiref datetime formatter (accurate Date headers).
* Bugfix query_string value ASGI conformance

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* Bugfix ensure that hypercorn as a command line (entry point) works.