message: added AddHandles command
diff: @@ -5,6 +5,7 @@ use tokio::sync::oneshot::Sender;
  use crate::response::FeroxResponse;
  use crate::{
  + event_handlers::Handles,
  message::FeroxMessage,
  statistics::{StatError, StatField},
  traits::FeroxFilter,
  @@ -78,4 +79,8 @@ pub enum Command {
  /// Break out of the (infinite) mpsc receive loop
  Exit,
  +
  + /// Give a handler access to an Arc<Handles> instance after the handler has
  + /// already been initialized
  + AddHandles(Arc<Handles>),
  }
  