doc: T4415: Added back copyrights for components

[zdc]

Change Summary

Copyright information must not be deleted with the rest documentation files.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Code style update (formatting, renaming)
• Refactoring (no functional changes)
• Migration from an old Vyatta component to vyos-1x, please link to related PR inside obsoleted component
• Other (please describe): changes in documentation inside an image

Related Task(s)

https://phabricator.vyos.net/T4415

Component(s) name

documentation

Proposed changes

During the build, all documentation is removed, but copyright notes must be kept. This commit modifies a hook to ignore copyright files. Also, /usr/share/docutils was removed from the hook, because the folder does not actually exist anymore.

How to test

Check the content of the /usr/share/doc folder in an image. It must contain only copyright files.

Checklist:

• I have read the CONTRIBUTING document
• I have linked this PR to one or more Phabricator Task(s)
• My commit headlines contain a valid Task id
• My change requires a change to the documentation
• I have updated the documentation accordingly