const runtime.maxWhen

5 uses

	runtime (current package)
		proc.go#L5985: 		if when := timeSleepUntil(); when < maxWhen {
		time.go#L269: const maxWhen = 1<<63 - 1
		time.go#L297: 		when = maxWhen
		time.go#L1035: 			next = maxWhen
		time.go#L1178: 	next := int64(maxWhen)