Old PLIPS and open tickets from Trac, packed as tar.gz
In the case of log messages, it usually is a closed ticket
Have we kept a dump of the Trac database so that it would be possible to extract the closed tickets as well ? (I'd be happy to make that work if needed)
best shot would be @mauritsvanrees, I think. At least he also worked on the tarball. However, I'm not 100% sure there was even DB access at that point, so it might have been httrack-ed...
The trac instance did get regularly indexed by the Wayback machine, but that's not a scalable solution. You might get lucky on an individual ticket number, though.
From what I see in my mail archive(mail to @svx and Paul on 31 July 2016) , I only made some improvements to the tarball that was already there, and Sven put the improved version online. (I checked, and it is indeed the version I improved, making the pages clickable when they point to other tickets, mostly.) So I guess the original was either made by Sven or Paul, or someone else in the AI team at the time.