Log message:
python/wheel.mk: simplify a lot, and switch to 'installer' for installation

This follows the recommended bootstrap method (flit_core, build, installer).

However, installer installs different files than pip, so update PLISTs
for all packages using wheel.mk and bump their PKGREVISIONs.

Log message:
py-checkdmarc: updated to 4.4.5

4.4.4

Fix DNS caching

4.4.3

Fix tarball build

4.4.2

Fix CSV output
Always parse RUA and RUF fields, even if other parts of the record are invalid
Convert documentation to markdown
Migrate build from setuptools to hatch
Migrate automated testing from Travis CI to GitHub Actions

Log message:
py-checkdmarc: propagate PYTHON_VERSIONS_INCOMPATIBLE

Log message:
mail/py-checkdmarc: import py-checkdmarc-4.4.1

A Python module and command line utility for validating SPF and
DMARC DNS records.