[$] Changes in shadow-utils password-expiration features

The
release is most noteworthy for what has been removed. Specifically,
several utilities and functionality related to periodic password
expiry, which were deprecated in the December 2025 4.19.0
release, have been removed as planned. It is still possible to manage
some aspects of password aging with shadow-utils, but organizations
that depend on such features should start planning for their complete
removal within a few years.