Merge origin/develop into feat/rfc9991-forensic-reporting

Conflicts in reports/opendmarc-reports.in and .8.in: develop's trusteddomainproject#437/trusteddomainproject#438
are squash-merged copies of commits this branch already had (from before
its DMARCbis work started) under different, non-PR-suffixed hashes --
same author, same message, same content, just two different paths to
develop's tip vs. this branch's history. This branch's side of every
conflicting hunk is a strict superset (log_skip()'s syslog integration,
the "rate limit" loud_skip() reason, and the rua=/ruf= external-
destination verification block, none of which exist yet on develop) of
develop's side, so resolved by taking this branch's version throughout.

Verified on quark: perl -c on the generated opendmarc-reports script is
clean, and the full live test suite (11/11) still passes post-merge.

Author: thegushi