Refers to #77 and #63.

Refers to #77

Thanks, @o8opi

KSPP has added them to the recommendations.

Refers to #74.

That would allow to have more information in the mirror repositories.

I used the mattduck/gh2md tool for that purpose.
It employs https://api.github.com/graphql, so I had to generate
a GitHub personal access token (classic) with public access.

Currently GrapheneOS doesn't have it.

The corresponding checks have been developed.

1. Don't add an exception to normalize_cmdline_options() since strtobool()
is used for kpti

2. Use new '0' check of 'is not off'

3.10 is parsed as a number and it is trimmed to 3.1.
That is expected behavior for numbers, but it's crazy for versions.

Current `ubuntu-latest` (Ubuntu 22.04 for x86_64) provides the following
versions of Python:
 - 3.10.8
 - 3.11.0
 - 3.7.15
 - 3.8.15
 - 3.9.15