* Make the IHttpParser per frame and add a reset
- Made the IHttpParser a per frame object so state can be stored
across method calls and parses.
- Added HttpParserFactory to ServiceContext
- Replace endpoint configuration via .UseUrls() or --server.urls with Listen*
methods on KestrelSerrverOptions.
- Replace IConnectionFilter with IConnectionAdapter which no longer exposes
ServerAddress via a context.
- Simplify libuv Listener classes
- Support systemd socket activation
- Add docker-based test for systemd socket activation to be run on Travis
David Fowler
Pavel Krymets
Stephen Halter
Cesar Blum Silveira