invoke_interval: Interval at which custom plugins will be invoked.timeout: Time after which custom plugins invokation will be terminated and considered timeout.max_output_length: The maximum standard output size from custom plugins that NPD will be cut and use for condition status message.concurrency: The plugin worker number, i.e., how many custom plugins will be invoked concurrently.enable_message_change_based_condition_update: Flag controls whether message change should result in a condition update.