Construct a basic_raw_socket without opening it.
basic_raw_socket( asio::io_service & io_service); basic_raw_socket( asio::io_service & io_service, const protocol_type & protocol); basic_raw_socket( asio::io_service & io_service, const endpoint_type & endpoint); basic_raw_socket( asio::io_service & io_service, const protocol_type & protocol, const native_type & native_socket);