What's happening is that if a relative path is detected in a markdown url, this code checks that the relative path prefix is there. I'm not really sure why this is the case. If I'm running Wordpres (I am) and upload images there, shouldn't I be able to use relative URLs without enforcing the relative_path?
@julian how difficult would it be to implement that check..? It's because the way I'm using NodeBB, each member has his own personal category and only a certain group is able to create topics in it. Since each member has his own category the admin home page is cluttered with every member's personal category. So it would be awesome if those categories don't show up in the admin's home page. 🙂