Add placeholder for remote storage locations

E.g. I use Dropbox. I’d like to have a placeholder {hostname} there so it’s possible to make this dynamic.

Especially when it comes to cloning the website e.g. to a local installation, I want the local installation not to be backed up in the production folder, but be able to just migrate the database without worrying to forget to change the backup location.

So Dropbox e.g.:

should become

This would help a lot!