gnupg21 2.1.1 (new formula)

New formula for gnupg2, 2.1.x branch.
Yes, It does. I don't want to push any chances until the maintainers have a chance to look over the principle of the PR though, because Mike killed the bot build earlier because I keep hogging the bot and other PRs get stacked up consequently, heh. If the maintainers want to move forwards, I'll fix this line. Cheers for the reminder :+1: