Function hyper::server::tcp::is_connection_error

fn is_connection_error(e: &Error) -> bool

This function defines errors that are per-connection. Which basically means that if we get this error from accept() system call it means next connection might be ready to be accepted.

All other errors will incur a timeout before next accept() is performed. The timeout is useful to handle resource exhaustion errors like ENFILE and EMFILE. Otherwise, could enter into tight loop.