Right now, when we reject anything in our list of URL shorteners and aggregators, we return this generic error: "Please don’t enter bundled/shortened URLs, enter the destination URL(s) instead".

These are two different kinds of links, so we should split the two. Shorteners should use the existing error option "This is a redirect link. Please follow

{redirect_url|your link}

and add the link it redirects to instead.", while aggregators should use a new error such as "This is an aggregator link. Please follow

{aggregator_url|your link}

and add all appropriate links separately instead."