"Caddyshack" started out as a straightforward coming-of-age comedy about a young guy working as a caddie on the links of a posh golf club; by the time it reached the screen, it had become a summit meeting between three comic heavyweights of the time. There was Chevy Chase, the former star of "Saturday Night Live;" Bill Murray, the then-current star of the show; and Rodney Dangerfield, the stand-up legend whose club in New York helped launch the career of many comedians like Jerry Seinfeld and...