In C++ encapsulate host/port/protocol information in a structure that is passed to the connection constructor

Give names and structure to the connection information.

This will allow us to pass this around in the code if/as we move to a connectionless state.

We can also forward the host/port/... queries to this structure and reduce the connection specific api to deal more with channels and data.

Something like (please fix the names)

struct conn_info { std::string hostname; short port; enum protocol; }

nds::connection(conn_info(hostname))

Ed and Jonathan had discussed maybe doing this as a class hierarchy to ally different types of connections, direct to a specific host, config by environment or dns or ...