Lintian tag information: doc-base-file-unknown-field (type: error)

Description (from lintian-explain-tags)

The doc-base control file contains a field that is either unknown or
invalid in the section in which it appears.

Possible reasons are a typo in field name, a missing empty line between
sections in the control file, or an extra empty line between sections.

Please refer to The main section (Section 2.3.2.1) in the Debian doc-base
Manual and Format sections (Section 2.3.2.2) in the Debian doc-base Manual
for details.

Visibility: error
Show-Always: no
Check: menus

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