Get logging settings from config file section "logging".

def _section(cls, opts):
        """Get logging settings from config file section "logging"."""
        if isinstance(cls.config, LuigiConfigParser):
            return False
        try:
            logging_config = cls.config['logging']
        except (TypeError, KeyError, NoSectionError):
            return False
        logging.config.dictConfig(logging_config)
        return True