The director of “The French Connection,” “The Exorcist,” “Sorcerer,” “Cruising,” “To Live and Die in L.A.,” “Bug,” and “Killer Joe,” to name just a few, William Friedkin is one of the greats to emerge from the 1970s brat pack director’s scene that included Martin Scorsese, Francis Ford Coppola, Peter Bogdanovich, and more.