HTTPS --> HTTP Insert Original Protocol

Cool... for the record, though, if all you want to do is insert a header, you don't technically need an iRule for it. You can create an HTTP profile that you'd apply only to your HTTPS virtuals, enable the "Header Insert" option, and use the text "Original-Protocol:HTTPS" (without the quotes) to accomplish the same thing. There's nothing wrong with using an iRule for it, but I figured I'd throw that in there.