Release notes 0.19.12

Bitcoin ABC version 0.19.12 is now available from:

https://download.bitcoinabc.org/0.19.12/

This release includes the following features and fixes: - Add the getblockstats RPC to get statistics on a block or a block range. - Logging improvements to reduce noisy network messages. - Logging added during wallet rescans. - Minor bug fixes, stability improvements, and typo corrections.