func (a *AddrBook) addToOldBucket(ka *knownAddress, bucketIdx int) bool {
	// Sanity check
	if ka.isNew() {
		log.Warn(Fmt("Cannot add new address to old bucket: %v", ka))
		return false
	}
	if len(ka.Buckets) != 0 {
		log.Warn(Fmt("Cannot add already old address to another old bucket: %v", ka))
		return false
	}

	addrStr := ka.Addr.String()
	bucket := a.getBucket(bucketTypeNew, bucketIdx)

	// Already exists?
	if _, ok := bucket[addrStr]; ok {
		return true
	}

	// Enforce max addresses.
	if len(bucket) > oldBucketSize {
		return false
	}

	// Add to bucket.
	bucket[addrStr] = ka
	if ka.addBucketRef(bucketIdx) == 1 {
		a.nOld++
	}

	// Ensure in addrLookup
	a.addrLookup[addrStr] = ka

	return true
}
func (a *AddrBook) addToOldBucket(ka *knownAddress, bucketIdx int) bool {
	// Sanity check
	if ka.isNew() {
		log.Warn(Fmt("Cannot add new address to old bucket: %v", ka))
		return false
	}
	if len(ka.Buckets) != 0 {
		log.Warn(Fmt("Cannot add already old address to another old bucket: %v", ka))
		return false
	}

	addrStr := ka.Addr.String()
	bucket := a.getBucket(bucketTypeNew, bucketIdx)

	// Already exists?
	if _, ok := bucket[addrStr]; ok {
		return true
	}

	// Enforce max addresses.
	if len(bucket) > oldBucketSize {
		return false
	}

	// Add to bucket.
	bucket[addrStr] = ka
	if ka.addBucketRef(bucketIdx) == 1 {
		a.nOld++
	}

	// Ensure in addrLookup
	a.addrLookup[addrStr] = ka

	return true
}
// Adds ka to old bucket. Returns false if it couldn't do it cuz buckets full.