Construct with specified service name for any protocol.
basic_resolver_query( const std::string & service_name, int flags = passive|address_configured); basic_resolver_query( const protocol_type & protocol, const std::string & service_name, int flags = passive|address_configured); basic_resolver_query( const std::string & host_name, const std::string & service_name, int flags = address_configured); basic_resolver_query( const protocol_type & protocol, const std::string & host_name, const std::string & service_name, int flags = address_configured);