- Made TransportConnecton derive from ConnectionContext
- Less objects, less opinions about what the ConnectionContext is. This diverges from what we do with HttpContext but it seems better overall.
- Made DefaultConnectionContext
- Usable for unit testing
- Usable for benchmarking
* Renames from API review
- Rename Microsoft.AspNetCore.Protocols.Abstractions to Microsoft.AspNetCore.Connections.Abstractions.
- Renamed IConnectionHandler to IConnectionDispatcher (and related properties and types)
- Added ConnectionHandler and UseConnectionHandler extension method to Connections.Abstractions.
- Use ActivatorUtilties to create the ConnectionHandler