Code review comment for ~virtustom/ubuntu-docker-images/+git/utils:main

Duly noted and all code comments should be addressed in latest commit. Tested again as in description with same result.

You are right about distro-info and it actually fails after the date of latest entry in the CSV file (/usr/share/distro-info/ubuntu.csv) gets out of date when invoked with --devel. I'll address this in later commit. Set as WIP for now.