mod_md v2.4.26

• Using OCSP stapling information to trigger certificate renewals. Proposed
  by Fraser Tweedale.
• Added directive MDCheckInterval to control how often the server checks
  for detected revocations. Added proposals for configurations in the
  README.md chapter "Revocations".
• OCSP stapling: accept OCSP responses without a nextUpdate entry which is
  allowed in RFC 6960. Treat those as having an update interval of 12 hours.
  Added by @frasertweedale.
• Adapt OpenSSL usage to changes in their API. By Yann Ylavic.

mod_md v2.4.25

• Fix the reported "until" validity of a certificate in the status handler.
  [Rainer Jung]
• Fix possible NULL deref when logging the error that an authentication
  resource could not be retrieved from the ACME server. Refs #324

mod_md v2.4.24

• Fixed passing of the server environment variables to programs started via
  MDMessageCmd and MDChallengeDns01 on *nix system. See #319.

mod_md v2.4.23

• New directive MDMatchNames all|servernames to allow more control over how
  MDomains are matched to VirtualHosts.
• New directive MDChallengeDns01Version. Setting this to 2 will provide
  the command also with the challenge value on teardown invocation. In version
  1, the default, only the setup invocation gets this parameter.
  Refs #312. Thanks to @domrim for the idea.

mod_md v2.4.22

• For Managed Domain in "manual" mode, the checks if all used ServerName and
  ServerAlias are part of the MDomain now reports a warning instead of an error
  (AH10040) when not all names are present.
  This should resolve #301.

mod_md v2.4.21

• MDChallengeDns01 can now be configured for individual domains.
  Using PR from Jérôme Billiras (@bilhackmac) and adding test case and fixing proper working
• Fixed a bug found by Jérôme Billiras (@bilhackmac) that caused the challenge
  teardown not being invoked as it should.

mod_md v2.4.20

• Enabling ED25519 support and certificate transparency information when
  building with libressl v3.5.0 and newer. Thanks to Giovanni Bechis.

mod_md v2.4.19

• restored curl_easy cleanup behaviour from v2.4.14 and refactored
  the use of curl_multi for OCSP requests to work with that. Fixes #293.

mod_md v2.4.18

• New directive MDStoreLocks that can be used on cluster setups with
  a shared file system for MDStoreDir to order activation of renewed
  certificates when several cluster nodes are restarted at the same time.
  Store locks are not enabled by default.

mod_md v2.4.17

• A bug was fixed that caused very large MDomains with the combined DNS
  names exceeding ~7k to fail, as request bodies would contain partially
  wrong data from uninitialized memory. This would have appeared as
  failure in signing-up/renewing such configurations.
  This was reported by Ronald Crane (Zippenhop LLC).