Use Acquire::Allow{InsecureRepositories,DowngradeToInsecureRepositories}

Use Acquire::Allow{InsecureRepositories,DowngradeToInsecureRepositories}

The configuration key Acquire::AllowInsecureRepositories controls if
apt allows loading of unsigned repositories at all.

The configuration Acquire::AllowDowngradeToInsecureRepositories
controls if a signed repository can ever become unsigned. This
should really never be needed but we provide it to avoid having
to mess around in /var/lib/apt/lists if there is a use-case for
this (which I can't think of right now).