“Nosferatu” began its undead life in 1922 as a silent, unauthorized adaptation of Bram Stoker’s 1897 novel “Dracula.” But F.W. It all starts with Murnau’s original, which gave us the towering, severe and altogether terrifying Max Schreck as Count Orlok some nine years before Bela Lugosi played the count as a suave Lothario in Tod Browning’s “Dracula.” Still a favorite …