KDAG Monthly Update | March 1–30, 2023 by KDAG Foundation

Technology Development:
1. github code submitted 15 times, added and modified 21 files.
2. exchange and community technical support, the test network continues to develop and test

The specific modifications are as follows:
1. cmd/kdag: make account commands not require datadir lock.
2. light/butterfly: use atomic type, use a suitable name for the stopped switch in LightChain.
3. trie: add node type common package. In trie/types package, a few node wrappers are defined, which will be used in both trie package, trie/snap package, etc. Therefore, a standalone common package is created to put these stuffs.
4. kdag/testnet: fix crash on querying nil finalized block.
5. cmd/utils/node: switch to Pebble as the default db if none exists.
6. cmd/node: fall back to LevelDB on platforms not supporting Hub.
7. core/rawdb: default to Hub at the node level.
8. cmd/kdag: fix some tests explicitly using LevelDB.
9. cmd/devp2p: make crawler-route53-updater less verbose, makes the crawler less verbose on route53-based scenarios.
10. cmd/testnet: fix log of ignored recent nodes counter.

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