I suspected that this had been submitted, but wasn’t able to find it.
What do you think of having the story submission form show any dups before submission? Or at least have the search functionality match URLs (https://lobste.rs/search?utf8=%E2%9C%93&q=http%3A%2F%2Fwww.itwire.com%2Fbusiness-it-news%2Fopen-source%2F57589-upstream-vendors-can-harm-small-projects-openbsd-dev%2F57589-upstream-vendors-can-harm-small-projects-openbsd-dev&what=all&order=relevance)
It does match on similar URLs already, but the URL you submitted is quite different.
Ok, I can see that the link I tried has an extra article ID appended, but even the URL from the original submission is not found.
Maybe because of this, I’m not sure:
Ok, I’ll take a look at it when I have some time
Seems like you have a great idea for a new feature. Lobsters is open source, so if you want more intelligent url searching, you can feel free to make a pull request.