FORT COLLINS, Colo. — By the end of May, a Fort Collins brewery will change its name permanently from Zwei Brüder Brewing to Zwei Brewing in order to avoid a costly lawsuit. Just a few months after opening their business last August, brothers Kirk and Eric Lombardi received a cease-and-desist letter from the Warrenville, Ill.-based Two Brothers Brewing Co. “We could have taken them to court,” said Kirk Lombardi. “But really, we would have had to invest a lot of money in a legal fight that …