Some branches of the French fast-food chain Quick no longer sell anything that’s not halal, or allowed under Islam. And not everyone is pleased with this. The mayors of several town have protested what they call discrimination against non-Muslims. Quick, the French answer to McDonalds, has been experimenting since last fall with a menu altered to suit Muslim customers.Halal products may not contain pork or animals that were not ritually slaughtered. The demand is so strong that Quick wants to convert more branches to halal food.