mod_md v2.2.3

• Configuring MDCAChallenges replaces any previous existing challenge configuration. It
  had been additive before which was not the intended behaviour. [@mkauf]
• Fixing order of ACME challenges used when nothing else configured. Code now behaves as
  documented for MDCAChallenges. Fixes #156. Thanks again to @mkauf for finding this.
• Added a script - inspired by curl https://github.com/curl - that collects contributors
  from the git commits and PRs. Adding a "Thanks" section with their names in the README.md.

mod_md v2.2.2

• Fixing a potential, low memory null pointer dereference [thanks to @uhliarik].
• Fixing an incompatibility with a change in libcurl v7.66.0 that added unwanted
  "transfer-encoding" to POST requests. This failed in directy communication with
  Let's Encrypt boulder server (however it worked when accessed via the hosting CDN,
  as almost all live usages do). Thanks to @mkauf for finding and fixing.
• Fixes a compiler warning. False flag, but initialization to make it happy does not hurt.
  Thanks to @sundayoyeniyi for finding this. Refs #154.

mod_md v2.2.0

• No longer beta status
• Synched with Apache trunk and planned for 2.4.x backport when all works well there
• Re-importing of log tags assigned in Apache project
• Some documentation clarifications
• New OCSP Stapling implementation
• Various improvements and fixes during v2.1.x development. See ChangeLog for details

mod_md v2.1.10 (annoyingly still beta)

• if 'MDBaseServer' in enabled and there is no specific VirtualHost for a domain, the
  base server config is considered the relevant one for deciding ACME support. This
  is most relevant for the 'tls-alpn-01' challenge, see issue #150).
• MDMessageCmd is now invoked with 'installed' when the certificate is actually becoming
  active at server startup/reload. Different to all other messages, this one is invoked
  while the server is still root and has according privileges. (Hint: you may use this
  to copy a certificate+key to another application's preferred location/format.)

mod_md v2.1.9 (almost not beta)

• server-status no longer leaves the "activity" column empty when a renewal is ongoing.
• server-status activity: report a renewal as "pending" when it is due but no job has been
  started yet.
• removed the "valid after" time as this was confusing. The new certificate is already
  valid, only it is recommeneded to wait with the actication a bit. Admins are probably
  better aware what the clock skew requirements of their site are.

mod_md v2.1.8 (just a touch of beta)

• Some notifications cleanups:
  • notifications about errors no longer change the status of the ongoing renewal.
  • notifications about a successful renewal are re-attempted on failure, just like
    other failures cause a retry with a backing-off delay.
  • warnings about expiring certificates are only sent, if there is no renewal
    already done (but maybe not activated yet) for a domain
  • failure to notify about expiring certficates also cause retry and are cleared
    when/if finally successful.

mod_md v2.1.7 (beta almost over)

• Changed server-status section headings to make more clear what is listed there.
• no longer listing the logs in the top-level md-status handler (where all managed
  domains are listed). Getting the status of a particular domain has the log).
• fixing some signedness warnings in clang 11.
• Fixes bug in time period calculation for removing old OCSP response files.

mod_md v2.1.6 (beta)

• Fixed issue #145 where a server restart was not done when recommended and checking
  becamed called in a tight loop, eventually calling message commands again and again.
  Test case added for this.
• 'make test' will now trigger the build if not done before. removed some obsolete
  test special targets.
• starting to integrate with travis for build and test coverage
• documented how MDCAChallenges now overrides any port sanity checks.

mod_md v2.1.5 (beta)

• fixed a crash when the server-status page was retrieved in text form (e.g. server-status?auto
  url) and a MDomain had been renewed. Test case added. Fixes #141.
• Test suite: rework on how httpd config is set up to allow for MDomain tests that use
  the base server and listen only on one port.

mod_md v2.1.4 (beta)

• added test case for #142 and fixed a bug in JSON array handling introduced in 2.1.3