
**Apache Airflow version**:
1.10.13

**What happened**:
`force_logout_after` should be `force_log_out_after` in the code section https://github.com/apache/airflow/blob/master/airflow/settings.py#L372-L381. As `force_log_out_after` is actually used and written in https://github.com/apache/airflow/blob/c5700a56bb3b9a5b872bda0fe0d3de82b0128bdf/UPDATING.md#unify-user-session-lifetime-configuration.

**What you expected to happen**:
`force_logout_after` is renamed to `force_log_out_after`.
airflow/settings.py
"""
    Any additional configuration (register callback) for airflow.utils.action_loggers
    module
    :rtype: None
    """
def prepare_syspath():
    """Ensures that certain subfolders of AIRFLOW_HOME are on the classpath"""
    if DAGS_FOLDER not in sys.path:
        sys.path.append(DAGS_FOLDER)
    # Add ./config/ for loading custom log parsers etc, or
    # airflow_local_settings etc.
    config_path = os.path.join(AIRFLOW_HOME, 'config')
    if config_path not in sys.path:
        sys.path.append(config_path)
    if PLUGINS_FOLDER not in sys.path:
        sys.path.append(PLUGINS_FOLDER)
def get_session_lifetime_config():