Consider adding new predicate to KiwiRetryerPredicates for socket timeout on connect

[sleberknight]

Should we add a new predicate that only matches on connect for socket timeouts?

example code:

var retryer = KiwiRetryer.<Response>.builder()
    ...
    .exceptionPredicate(ex -> {
        // handle SocketTimeoutExceptions that are caused by connection timeouts, NOT read timeouts
        var rootCause = ExceptionUtils.getRootCause(ex);

        return (rootCause instanceof SocketTimeoutException) && messageContainsConnect(rootCause);
    })
    .build();

and the messageContainsConnect method:

private static boolean messageContainsConnect(Throwable t) {
    return Optional.ofNullable(t.getMessage()).orElse("[empty]").toLowerCase(Locale.US).contains("connect");
}

Is there a better way to detect when a SocketTimeoutException occurs when connecting than checking the message to see if it contains "connect"?

Plus, would need to re-verify that the exception message is consistent across every version of the JDK, which is icky.