Comment 3 for bug 1989508

This 404 still seems to be situation.

Wayback machine last snapshot of this file is from 2022-04-20:
https://web.archive.org/web/20220420014143/http://hplip.sourceforge.net/plugin.conf

As far as I can tell, hp-plugin cannot function without this file being available on the web site, so nobody has been able to install HP printers requiring these drivers since some time in spring 2022?