CleverRaven/Cataclysm-DDA — pull request #9551 by Coolthulhu (2014-10-15 06:02:03+00:00)
Title: Unfermented vinegar and recipe for it

Uses alcohol fermentation mechanics. Made from water and one of: juice, cider or fruit wine. Ferments for 11 and a half day, is auto-unlocked at cooking 3 and takes 8 minutes for 14 units of "must".

IRL vinegar is easy to make (naturally happens in badly stored juices/wines), so low skill, autolearn and low craft time. IRL it ferments anywhere from 2 weeks to 6 months, 11.5 game days was chosen arbitrarily. It should be fermented in glass or ceramic containers, but implementing that would require yeast flask style code (rather tedious for players who want to mass produce stuff).

This is my first PR, so I may have done something wrong. I tested it and it worked as it should, though.