Refuse a connectTimeout Node's timers cannot hold, and pin the refusals the tests missed

src/client.ts

@@ -94,8 +94,7 @@ function openSocket(options: ClientOptions): Promise<Result<{ sock: Socket }>> {
 		}
 
 		const settle = (result: Result<{ sock: Socket }>): void => {
-			if (timer) clearTimeout(timer);
-
+			clearTimeout(timer);
 			sock.removeListener('error', onError);
 			signal?.removeEventListener('abort', onAbort);
 			resolve(result);

src/session-options.ts

@@ -168,15 +168,23 @@ function limitsOf(options: CheckableOptions): [string, number, number][] {
 	];
 }
 
-/** Leaving it out is how the wait stays the OS's, so 0 would be a second spelling for that. */
+/** Node's timers are 32-bit, and a delay above this one fires after 1 ms instead of never. */
+const maxTimerDelay = 2_147_483_647;
+
 function checkConnectTimeout(connectTimeout: number | undefined): VoidResult {
 	if (connectTimeout === undefined) return {};
 
-	if (Number.isInteger(connectTimeout) && connectTimeout >= 1) return {};
-
 	const got = String(connectTimeout);
 
-	return { err: new Error(`connectTimeout must be 1 or more, got ${got}; omit it to wait the OS out`) };
+	if (!Number.isInteger(connectTimeout) || connectTimeout < 1) {
+		return { err: new Error(`connectTimeout must be a whole number of milliseconds, 1 or more, got ${got}; omit it to wait the OS out`) };
+	}
+
+	if (connectTimeout > maxTimerDelay) {
+		return { err: new Error(`connectTimeout must be ${String(maxTimerDelay)} or less, got ${got}`) };
+	}
+
+	return {};
 }
 
 function checkLimits(limits: [string, number, number][]): VoidResult {