Function log_access 

async fn log_access(
    loggers: &Vec<Sender<LogMessage>>,
    request_parts: &Parts,
    socket_data: &SocketData,
    auth_user: Option<&str>,
    status_code: u16,
    content_length: Option<u64>,
    date_format: Option<&str>,
    log_format: Option<&str>,
)

Sends a log message formatted according to the Combined Log Format