*****STONEHEAD-SIZED SPOILERS!!***** 1974’s “Zardoz”, written, produced and directed by John Boorman (“Deliverance” “Excalibur” “Exorcist II: The Heretic”) is, without a doubt, one of the single weirdest pieces of cinema sci-fi fans are likely to see. The movie first came on my personal radar at the tender age of 8, when I read about it in…