Actor RUTGER HAUER died at home last Friday of an undisclosed illness.He was 75.His family withheld the news until after his funeral, which was yesterday in the Netherlands. Hauer is probably best known for playing the "replicant" Roy Batty in the 1982 science fiction classic "Blade Runner".One of the highlights of that performance was his "Tears in Rain" speech . . . some of which he improvised. His second most-famous role would have to be that of the villain in the 1986 thriller "The Hitcher". His other work included the movies "Nighthawks", "Ladyhawke", "Batman Begins", "Buffy the Vampire Slayer", "Confessions of a Dangerous Mind", and "Sin City". And then, of course, there's "Hobo with a Shotgun" . . . the surprisingly tender while simultaneously ultraviolent story of a drifter who gives up his dream of buying a second-hand lawnmower to start a landscaping business . . . And instead scrapes up enough money panhandling to purchase a shotgun and single-handedly cleans up one of the most crime-riddled cities in cinematic history . . .Which is run by a sadistic crime boss called The Drake, and his sons Slick and Ivan, who dress like Tom Cruise in "All the Right Moves". They also employ an armored, motorcycle-riding, two-man hit squad called The Plague, who've apparently been around for thousands of years, and were the REAL killers of Jesus, Joan of Arc, and Abraham Lincoln, among others.