Copyright for dh-perl6 source package in Bullseye

Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/

Files: *
Copyright: 2018, Robert Lemmen 
 2020, Dominique Dumont 
License: Artistic-2.0

License: Artistic-2.0
                The Artistic License 2.0
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         Copyright (c) 2000-2006, The Perl Foundation.
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 Preamble
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 This license establishes the terms under which a given free software
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 Distribution of Modified Versions of the Package as Source 
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 (4)  You may Distribute your Modified Version as Source (either gratis
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 Distribution of Compiled Forms of the Standard Version 
 or Modified Versions without the Source
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 (6)  You may Distribute a Modified Version in Compiled form without
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 Aggregating or Linking the Package 
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 General Provisions
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 (10)  Any use, modification, and distribution of the Standard or
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 (11)  If your Modified Version has been derived from a Modified
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