Function rouille::start_server_with_pool

pub fn start_server_with_pool<A, F>(
    addr: A, 
    pool_size: Option<usize>, 
    handler: F
) -> ! where
    A: ToSocketAddrs,
    F: Send + Sync + 'static + Fn(&Request) -> Response, 

Identical to start_server but uses a ThreadPool of the given size.

When pool_size is None, the thread pool size will default to 8 * num-cpus. pool_size must be greater than zero or this function will panic.