Link shortener scripts are a bit of a gray area. I don’t think your account will be suspended right away if you upload it (which does happen with some software that’s actually banned), but if your account gets suspended for something related to the URL shortener, it may not be reactivated again.
The root of the issue is that public URL shorteners are frequently abused by spammers to hide their scam links behind your domain name. We don’t want that to happen. And we’re holding your responsible for the content on your site, so think twice before letting people create short URLs on your site hosted with us.