And don't fail the script if it doesn't download. This way we can keep
using the old one at least until it times out.

With extra check to see if it actually resolves.

notifier: Notifier now checks if delay value exceeds 10 days. Fixed problem with overruning days in at command parameter.

By using the busybox one unconditionally

For distribution purposes, mostly.

At least for now. We want to download and generate it on the spot in
future and renew it.