Add some tools to handle yearly copyright notice updates.
We are now following the GNU guidelines: A new release automatically
means that the copyright year of all affected files gets updated; it
is no longer used to track years of modification changes.
* src/tools/update-copyright-year: New Perl script.
* src/tools/update-copyright: New shell script that calls
`update-copyright-year' on all files.
* src/tools/no-copyright: Exceptions that should not be handled by
`update-copyright'
4 files changed