    Suspend shell execution.
    
    Suspend the execution of this shell until it receives a SIGCONT signal.
    Unless forced, login shells and shells without job control cannot be
    suspended.
    
    Options:
      -f	force the suspend, even if the shell is a login shell or job
    		control is not enabled.
    
    Exit Status:
    Returns success unless job control is not enabled or an error occurs.
