• Refactoring the initialization to distinguish between VirtualHost definitions that have
  SSLEngine on and those who do not. The advantages are:
  • No MDPortMap definition is necessary to detect where SSL certificates are needed.
  • mod_md will only collect ServerName/ServerAlias from VirtualHosts that use SSL.
  • One can have a 'catch-all' VirtualHost on port 80 using all domains without them
    bleeding back into the MD definitions.
• Initialization no longer traverses the complete md store, reads configured MD JSON
  files only once and writes them only when changed. When a new MD is added or
  an existing one renamed (the first domain member changes), will the store be searched
  for old definitions and certificates. This search only looks at MDs outside the current
  set and should remain efficient with many MDs configured.
  Example: if you have 100 MDs and rename 1, mod_md will see the 99 directories that stayed
  and load the one unmatched to check for a rename.