Canonical alternate short url links

I think we should add a tag like this to each of our documentation pages: <link rev="canonical" rel="self alternate shorter" href="http://php.net/echo"> On the http://us.php.net/manual/en/function.echo.php page I want to support the effort underway to take the Web back from the URL shorteners. I don't think it is healthy for the Web that everything is a tinyurl these days. I'd much rather that people use php.net/echo than tinyurl.com/abc123 to link to http://us.php.net/manual/en/function.echo.php and by adding the canonical link tag above, we take the first step towards things like http://revcanonical.appspot.com/ working and eventually twitter clients and other things doing this automatically themselves or using the revcanonical api to do it for them. It is just as easy as getting a url from a tinyurl service and you end up with a better, more permanent and more descriptive url. It should be a trivial change that we can get done in short order. -Rasmus