It looks like these were set up by "Hugo" but I don't know who that is; I don't think it's anybody affiliated with our project. Back when these archives were set up, MacPorts was hosted by Mac OS Forge, and our mailing list addresses were at a hostname related to Mac OS Forge, which I'm guessing is how "mac-os-forge" made its way into the URLs for those Nabble archives.
The Mac OS Forge service closed in 2016. and the MacPorts mailing lists moved to a MacPorts hostname. But Nabble still considers MacPorts to be a subcomponent of the now defunct Mac OS Forge organization.
I'd like to move the MacPorts subcategory of the Mac OS Forge forum to its own top-level forum. I don't want to lose all the messages Nabble has been archiving over the years, and I don't want to lose the URLs that Nabble had been using for our archives, but ideally I would like the old URLs to redirect to new ones that say "macports" rather than "mac-os-forge".
We also need to update the list email addresses for all of our lists to use our new hostname. Currently, messages posted through Nabble still go to the old Mac OS Forge hostname. And while that is currently configured to forward to the new hostname, users whose email providers have strict DMARC policies cannot view those forwards, so we want to turn off that forwarding and ensure everyone is using the new hostname.
I created a "macports" account within the Mac OS Forge organization, if that helps for assigning the MacPorts forums to us.