Kanseru can skip pages

[Akenaide]

for {
	select {
	case retryLink := <-retry:
		jobs <- retryLink
		log.Printf("Retry: %v", retryLink)
	default:
		jobs <- fmt.Sprintf("%v?page=%d", Baseurl, page)
		page = page + 1
	}

	if kanseru {
		log.Println("Kanseru at: ", page)
		break
	}
}

We should put a condition on the break.

[Akenaide]

It can still appear, it's less frequent but still there. You can see LRC needed 2 runs to get all cards :
af9be2576338269ee5fc53521473f6a11d7dcb84
0b2eb11821b43808869e818f6b327d801af94a5e

Maybe we should rework all the goroutine logic.