Update node.cpp

cleanup std::cerr logging by default

rai/node/node.cpp

@@ -666,7 +666,7 @@ insufficient_work_logging_value (true),
 log_rpc_value (true),
 bulk_pull_logging_value (false),
 work_generation_time_value (true),
-log_to_cerr_value (true),
+log_to_cerr_value (false),
 max_size (16 * 1024 * 1024),
 rotation_size (4 * 1024 * 1024),
 flush (true)