Changed description of request_aggregator_threads (nanocurrency#4477)

* Changed description of request_aggregator_threads to something more user friendly

* Improved description

nano/node/nodeconfig.cpp

@@ -130,7 +130,7 @@ nano::error nano::node_config::serialize_toml (nano::tomlconfig & toml) const
 	toml.put ("max_work_generate_multiplier", max_work_generate_multiplier, "Maximum allowed difficulty multiplier for work generation.\ntype:double,[1..]");
 	toml.put ("frontiers_confirmation", serialize_frontiers_confirmation (frontiers_confirmation), "Mode controlling frontier confirmation rate.\ntype:string,{auto,always,disabled}");
 	toml.put ("max_queued_requests", max_queued_requests, "Limit for number of queued confirmation requests for one channel, after which new requests are dropped until the queue drops below this value.\ntype:uint32");
-	toml.put ("request_aggregator_threads", request_aggregator_threads, "Number of threads to dedicate to request aggregator. The default value is the minimum of 4 or the number returned by nano::hardware_concurency(), which is the number of hardware threads or the value of the environment variable NANO_HARDWARE_CONCURRENCY.");
+	toml.put ("request_aggregator_threads", request_aggregator_threads, "Number of threads to dedicate to request aggregator. Defaults to using all cpu threads, up to a maximum of 4");
 	toml.put ("max_unchecked_blocks", max_unchecked_blocks, "Maximum number of unchecked blocks to store in memory. Defaults to 65536. \ntype:uint64,[0..]");
 	toml.put ("rep_crawler_weight_minimum", rep_crawler_weight_minimum.to_string_dec (), "Rep crawler minimum weight, if this is less than minimum principal weight then this is taken as the minimum weight a rep must have to be tracked. If you want to track all reps set this to 0. If you do not want this to influence anything then set it to max value. This is only useful for debugging or for people who really know what they are doing.\ntype:string,amount,raw");
 	toml.put ("backlog_scan_batch_size", backlog_scan_batch_size, "Number of accounts per second to process when doing backlog population scan. Increasing this value will help unconfirmed frontiers get into election prioritization queue faster, however it will also increase resource usage. \ntype:uint");