pub const DEFAULT_CONNECT_TIMEOUT: Duration;Expand description
How long establishing a connection – DNS, then the TCP and TLS
handshake – may take, independent of DEFAULT_TIMEOUT.
Set apart from the total deadline so a route that never completes a handshake is a different fact, in a log line, from a server that connects and then answers too slowly: the first is a network problem, the second is the remote server’s.