Synchronously save the dataset to disk and then shut down the server

    CLI Example:

    .. code-block:: bash

        salt '*' redis.shutdown

def shutdown(host=None, port=None, db=None, password=None):
    '''
    Synchronously save the dataset to disk and then shut down the server

    CLI Example:

    .. code-block:: bash

        salt '*' redis.shutdown
    '''
    server = _connect(host, port, db, password)
    try:
        # Return false if unable to ping server
        server.ping()
    except redis.ConnectionError:
        return False

    server.shutdown()
    try:
        # This should fail now if the server is shutdown, which we want
        server.ping()
    except redis.ConnectionError:
        return True
    return False