Today around 12h10, the home-computer ‘Phoenix’, which also acts as my Web-server, suffered from an apparently-random crash, which resembled this crash in the past.
This time, the problem had nothing to do with my DSL, which is currently continuing to perform well.
I happened to be using this server-box as a workstation at the same time, and this might not be a good thing to do, because this hardware from 2008 may be becoming faulty. When I do not use the computer as a workstation, it seems to have better luck against such crashes.
I am happy with the fact that a simple reboot seemed to restore what this computer does, and within barely 5 minutes of it going down.