message: [addrman] Don't rebucket new table entries unnecessarily
  Only rebucket if the asmap checksum has changed, not if the file format
  has changed but no asmap is provided.
  Also, don't try to add an entry to another bucket if it already appears
  in ADDRMAN_NEW_BUCKETS_PER_ADDRESS buckets.
diff: @@ -517,6 +517,8 @@ public:
  }
  }
  + // Attempt to restore the entry's new buckets if the bucket count and asmap
  + // checksum haven't changed
  uint256 supplied_asmap_checksum;
  if (m_asmap.size() != 0) {
  supplied_asmap_checksum = SerializeHash(m_asmap);
  @@ -525,19 +527,26 @@ public:
  if (format >= Format::V2_ASMAP) {
  s >> serialized_asmap_checksum;
  }
  + const bool restore_bucketing{nUBuckets == ADDRMAN_NEW_BUCKET_COUNT &&
  + serialized_asmap_checksum == supplied_asmap_checksum};
  for (auto bucket_entry : bucket_entries) {
  int bucket{bucket_entry.first};
  const int entry_index{bucket_entry.second};
  CAddrInfo& info = mapInfo[entry_index];
  +
  + // The entry shouldn't appear in more than
  + // ADDRMAN_NEW_BUCKETS_PER_ADDRESS. If it has already, just skip
  + // this bucket_entry.
  + if (info.nRefCount >= ADDRMAN_NEW_BUCKETS_PER_ADDRESS) continue;
  +
  int nUBucketPos = info.GetBucketPosition(nKey, true, bucket);
  - if (format >= Format::V2_ASMAP && nUBuckets == ADDRMAN_NEW_BUCKET_COUNT && vvNew[bucket][nUBucketPos] == -1 &&
  - info.nRefCount < ADDRMAN_NEW_BUCKETS_PER_ADDRESS && serialized_asmap_checksum == supplied_asmap_checksum) {
  + if (restore_bucketing && vvNew[bucket][nUBucketPos] == -1) {
  // Bucketing has not changed, using existing bucket positions for the new table
  vvNew[bucket][nUBucketPos] = entry_index;
  info.nRefCount++;
  } else {
  - // In case the new table data cannot be used (format unknown, bucket count wrong or new asmap),
  + // In case the new table data cannot be used (bucket count wrong or new asmap),
  // try to give them a reference based on their primary source address.
  LogPrint(BCLog::ADDRMAN, "Bucketing method was updated, re-bucketing addrman entries from disk\n");
  bucket = info.GetNewBucket(nKey, m_asmap);
  