code: @Deprecated
      protected ZAgent agent(Socket phone, String secret)
      {
          return ZAgent.Creator.create(phone, secret);
      }
docs: Creates a new agent for the star.
  
  @param phone   the socket used to communicate with the star
  @param secret  the specific keyword indicating the death of the star and locking the agent. Null to override the lock mechanism.
  @return the newly created agent for the star.