• Support added for MDomains consisting of a wildcard. Configuring MDomain *.host.net
  will match all virtual hosts matching that pattern and obtain one certificate for it
  (assuming you have 'dns-01' challenge support configured). Addresses #239.
• Fixed a bug that prevented "renewed" notifications to be sent out when a renewal job
  had already successfully notified about another event. See #235.
• new event challenge-setup:<type>:<domain>, triggered when the challenge data
  for a domain has been created. This is invoked before the ACME server is told to
  check for it. The type is one of the ACME challenge types. This is invoked for
  every DNS name in a MDomain.
• Using configure with --with-boulder or --with-pebble selects the
  default URLs for both test servers.
• Removed the special environment variable passing for MDChallengeDns01 again as
  this interferes with needed environment variables on platforms.
• mod_md is enabled in freebsd's apache24 package since August 2020, thanks to
  Mina Galić (@igalic). Nice!