Preflight setup performs cleaning task

[gbraad]

You could imagine to check for SHA sums of existing files... and when not matching remove them to force a redownload, etc

But also dealing with the resolver files on macOS and dnsmasq configuration of Linux, like #335

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.