It seems people have different expectations about WebLabels matching, based on quite confusing docs & specs.
Either way, some sites rely on (sometimes broken) labels, some on (sometimes arbitrary, rather than canonical) URLs.
This PR tries to accommodate as much as possible of the fuzziness around, making sense of the author's likely intent.

Some sites positively impacted by this change:

https://melpa.org/
https://try.gitea.io/
https://www.eff.org/
https://ssd.eff.org/
https://www.defectivebydesign.org/
https://openwireless.org/
http://boilr.mobi/
https://necessaryandproportionate.org/
https://posteo.de/en
https://defendinnovation.org/
https://ring.cx/en