Update for January failed

[LexPendragon]

That was the source list I was given during to fix the last failed update:

Update to 17.6 Fails

Using the first example on the list of https sites: #deb http://ftp.debian.org/debian stretch main contrib non-free #deb http://ftp.debian.org/debian/ stretch-updates main contrib non-free #deb http://security.debian.org/ stretch/updates main contrib non-free deb https://ftp.tu-graz.ac.at/mirror/debian/ stretch main contrib non-free deb https://ftp.tu-graz.ac.at/mirror/debian/ stretch-updates main contrib non-free deb http://security.debian.org/ stretch/updates main contrib non-free deb https:/…