The Boar’s Head brand of deli meat has been in the news lately because of a listeria outbreak that has killed 10 people across the US and sickened dozens more. But the controversy also has called attention to an epic family feud within the billon-dollar meat empire that stretches back decades. Sarah Nassauer of the Wall Street Journal explores the history, which begins simply enough in 1905 when Frank Brunckhorst started a meat-delivery service in Brooklyn. When he died, son Frank Jr. and his daughter’s husband, Bruno Bischoff, took over. Thus you have the two clans—the Brunckhorsts and the Bi…