Function refused 

fn refused(
    under_way: &[Setup],
    address: &str,
    socket: Option<(u64, u64)>,
    now: Instant,
) -> bool

Whether a new setup to address, whose socket file is socket now, is refused at now: one under way to the same bus (the same address, the same socket file) has been so longer than its limit (the bus takes connections and does not answer them). A bus started again at that path, the old one hung but alive, is another bus, tried at once.