puppetlast cronjob is too noisy, by assuming that all our systems are online 24/7
Originally created by @intrigeri on #12010 (Redmine)
Recently we added a mobile, not-always-on system that’s managed by our Puppet master. This triggers one email from puppetlast everyday. We should fix this somehow, e.g. by giving puppetlast a list of managed systems that it should ignore.