If ever there was a spirit cursed with a double-edged sword, it’s absinthe. On one hand, its many nicknames include the Green Fairy and the Green Muse. Drinkers of it include such notables of potables as Edgar Degas, van Gogh, Gauguin, Ernest Hemingway, Picasso, Oscar Wilde, and maybe it’s most famous drinker of all, Henri...