jamesob

> I suggest a regtest-only deployment is defined so functional testing can be re-instated. Currently there is zero consensus coverage at the functional level from what I can tell: [4c57901](https://github.com/bitcoin/bitcoin/commit/4c5790105e7fb3a2cd207403af769fbbccd7296d)...

I've pushed a rebase that - simplifies the commit structure, - removes some of the intra-commit whitespace/indent changes, - adds @average-gary's `uint256::FromHex()` test change (and author credits).

Looks good to me - doesn't hurt to keep updated.