False positive AGPL detection from a mere URL

We are detecting an AGPL with `agpl-3.0-plus_152.RULE` and this text `http://www.ghostscript.com` ... for instance from https://github.com/ReactiveX/rxjs/blob/6.x/README.md

This is noisy.

There are two ways out:
1. remove these short URL and related rules since they are not enough of their own to be a license detection, or
2. treat and report separately mere clues such as this one: they could be an interesting insight in some cases, but alone they are too weak to be considered a license detection