Today is the birthday of one Alan Alda, a fine human being and a friend of the Toast. There are no iterations of Alan Alda that are not perfect and loveable. Jack's dad on 30 Rock? Maximum Alda. Classic-M*A*S*H* era? Platonic ideal of Alda. Judge for Math-O-Vision? Alda as he was meant to be. Host of Scientific American Frontiers? All the Alda that's fit to print. I will brook no irony, no sly asides, in…