Clearly, the "http:" is parsed as a label (for goto), and the subsequent "//", as a C++ or C99 comment. This shouldn't give you more than a moment's pause if you know C.
I wouldn't be surprised if a fair majority of them have been taught to see goto as nothing but a vestige of the 70s which should never be used under any circumstances except as a meme or to deliberately obfuscate code.
I have recently become quite fond of goto-based error handling and find it a lot cleaner and more readable than the if-else-mountains you otherwise end up with. I just make sure to leave a comment with a link to xkcd.com/292 so anyone else reading it knows I'm aware of what I'm doing. Now with this URL trick I can do both in one line. :)
