Lintian tag information: copyright-file-lacks-pointer-to-perl-license (type: error)

Description (from lintian-explain-tags)

If your package is released under the same terms as Perl itself, it should
refer to the Artistic and GPL license files in the
/usr/share/common-licenses directory.

Please refer to Copyright information (Section 12.5) in the Debian Policy
Manual for details.

Visibility: error
Show-Always: no
Check: debian/copyright

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