Optional:    true,
			Type:        "on|off",
		},
		config.HelpKV{
			Key:         target.NATSStreamingMaxPubAcksInFlight,
			Description: "[DEPRECATED] number of messages to publish without waiting for ACKs",
			Optional:    true,
			Type:        "number",
		},
		config.HelpKV{
			Key:         target.NATSStreamingClusterID,
			Description: "[DEPRECATED] unique ID for NATS streaming cluster",
			Optional:    true,

streaming_async                   (on|off)    set to 'on', to enable asynchronous publish
streaming_max_pub_acks_in_flight  (number)    number of messages to publish without waiting for ACKs
streaming_cluster_id              (string)    unique ID for NATS streaming cluster
cert_authority                    (string)    path to certificate chain of the target NATS server