- Changed socket output to be based on pipelines
- Changed connection filter glue to be based on pipelines
- Codegen that used `MemoryPoolIterator` for output now uses `WritableBuffer`
- Made `UvWriteReq` async/await friendly with `LibuvAwaitable<T>`
- Deleted MemoryPool and friends
- 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
- Change most tests to use dynamic ports, rather than a fixed port obtained from GetNextPort().
- Add several new cases to `AddressRegistrationTests` and `ServerAddressFacts`.
- Remove project `test\Microsoft.AspNetCore.Server.Kestrel.TestCommon`. It's not longer needed, since only `AddressRegistrationTests` uses `GetNextPort()`.
- Even when safe handles are disposed explicitly, ReleaseHandle is sometimes
called on another thread which breaks uv_close.
- Ensure we close the UvAsyncHandle the uv loop so that the second call
to uv_run always completes without a timeout/Thread.Abort.
- Re-enable some tests. Add skip conditions for those that aren't passing.