NioSocketChannel.NioServerSocketChannel.SocketAddress.HandlerRegistry
for call dispatching.ChannelHandler that ensures that the handler is added to the
pipeline writes to the Channel may happen immediately, even before it is active.ProtocolNegotiator used for upgrading to HTTP/2 from HTTP/1.x.ProtocolNegotiators used by gRPC.HEADERS.ProtocolNegotiator that ensures the pipeline is set up so that TLS will
be negotiated, the handler is added and writes to the Channel may happen
immediately, even before the TLS Handshake is complete.