Johnny Mac: Windsor Castle legend featured in upcoming Netflix showWindsor Castle historian Johnny Mac is headed to the small screen.The 86-year-old Windsor-born historian, author, and keen polo player recently appeared on the program The Crown, which is loosely based on Queen Elizabeth II’s royal life, for the third time.Mac spoke to the Star this week about his experiences during his first appearance on the Netflix show, which is set to air on Dec. 8, and his work