Lintian tag information: changelog-file-missing-explicit-entry (type: warning)

Description (from lintian-explain-tags)

The latest changelog file for this package specifies a version in the form
of 1.2-3+deb8u1, 1.2-3+nmu4 (or similar) but this does not follow from a
corresponding 1.2-3 changelog stanza.

This suggests that changes were merged into a single entry. This is
suboptimal as it makes it more difficult for users to determine which
upload fixed a particular bug.

Please refer to Preparing packages to address security issues (Section
5.8.5.4) in the Debian Developer's Reference, NMUs and debian/changelog
(Section 5.11.2) in the Debian Developer's Reference, Direct updates to
testing (Section 5.14.3) in the Debian Developer's Reference, and
Bug#916877 for details.

Visibility: warning
Show-Always: no
Check: debian/changelog

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