Consensus on Transaction Commit

We will continue the consensus discussion from last time with Consensus on Transaction Commit (https://www.microsoft.com/en-us/research/publication/consensus-on-transaction-commit/) by Jim Gray & Leslie Lamport. So please read the paper: https://www.microsoft.com/en-us/research/wp-content/uploads/2016/02/tr-2003-96.pdf

Thanks to László (https://twitter.com/l_kiraly) for leading the discussion!