message: Provide detach-utility-actors default, close
diff: @@ -135,6 +135,7 @@ actor_system_config::actor_system_config()
  middleman_enable_automatic_connections = false;
  middleman_max_consecutive_reads = 50;
  middleman_heartbeat_interval = 0;
  + middleman_detach_utility_actors = true;
  middleman_detach_multiplexer = true;
  // fill our options vector for creating INI and CLI parsers
  opt_group{options_, "scheduler"}
  