Currently, HandleManager carefully reconstructs an item's URL
I believe in an effort to ensure that Handles only point at our own repositories. I'd like to modify this code to instead look up the URL from the item record, which would enable handles to point not only towards our own repository, but also to other locations. There are multiple use cases for this: the first is for content which has migrated to another repository altogether... it would be kind of us to ensure the handles we have carefully minted continue to resolve to the resource the represent. We did make a commitment that these URLs would be permanent. We'd like to stand by that commitment. Another used case would be for removed duplicate items, the additional handle could be configured to point to the correct item.