• Fixing configuration startup (e.g. dry run) to sync with the store again. This let's
  us find renamed MDs and use its correct paths. With wrong paths, mod_ssl gets unhappy
  and logs errors (see #125).
• Adding an experimental "check" column to server-status with links to known certificate
  checker sites.
• Certificate validity now appears as "valid-from"/"valid-until" pair.
• Adding SHA256 fingerprint to certificate-status for renewed certificate.
• md-status handler fixed to work on nested path locations as well.