• various fixes in MDRenewWindow handling when specifying percent. Serialization changed. If
  someone already used percent configurations, it is advised to change these to a new value,
  reload and change back to the wanted ones.
• various fixes in handling of MDPrivateKeys when specifying 2048 bits (the default) explicitly.
• mod_md version removed from top level md_store.json file. The store has its own format version
  to facilitate upgrades.