title: Lets Encrypt: repair broken certificate with certbot
body: <p>How can I run certbot to re-issue a specific (or all) certificate(s), if configuration is broken. E.g. if the content of folder <code>letsencrypt/live</code> was deleted accidentally.
  Using <code>renew</code> I get an error and certbot skips. Is there an option like <code>force-reinstall-if-broken</code> ?</p>