af1ed206f Fix broken Gmane URLs (Craig Younkins)
Pull request description:
This is an automated pull request to fix broken Gmane URLs. Here's what I did: First I searched for Gmane URLs in your repo. For each Gmane URL, I checked if the content was available at the URL. For URLs where the content was not available, I first checked the `article` subdomain of Gmane, which has some content not available on the `thread` and `comments` subdomains. If the content wasn't anywhere on Gmane's web interface, I resolved the URL to a [Message-ID](https://en.wikipedia.org/wiki/Message-ID) via the Gmane NNTP interface and tried to find the Message-ID on other mailing list archivers. I checked `mail-archive.com`, then `marc.info`, then `lists.debian.org` and so on. If a new URL was found, I replaced it in this pull request. If the content wasn't found, I left the link alone.
Backport of Core PR14848