http://www.google.com http://www.google.com and https://www.google.com https://www.google.com have two entirely different meanings when you get right down to it

http://www.google.com http://www.google.com and https://www.google.com https://www.google.com have two entirely different meanings when you get right down to it. Plus `//` is already used as a protocol agnostic way of accessing resources in HTML.