Copyright for golang-github-xiaq-persistent source package in Focal

Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: persistent
Source: https://github.com/xiaq/persistent

Files: *
Copyright: 2017 Qi Xiao 
License: EPL-1.0

Files: debian/*
Copyright: 2017 Shengjing Zhu 
License: EPL-1.0
Comment: Debian packaging is licensed under the same terms as upstream

License: EPL-1.0
 Eclipse Public License 1.0
 .
 THE ACCOMPANYING PROGRAM IS PROVIDED UNDER THE TERMS OF THIS ECLIPSE PUBLIC
 LICENSE ("AGREEMENT"). ANY USE, REPRODUCTION OR DISTRIBUTION OF THE PROGRAM
 CONSTITUTES RECIPIENT'S ACCEPTANCE OF THIS AGREEMENT.
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 1. DEFINITIONS
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 "Contribution" means:
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 a) in the case of the initial Contributor, the initial code and documentation
 distributed under this Agreement, and b) in the case of each subsequent
 Contributor: i) changes to the Program, and ii) additions to the Program; where
 such changes and/or additions to the Program originate from and are distributed
 by that particular Contributor. A Contribution 'originates' from a Contributor
 if it was added to the Program by such Contributor itself or anyone acting on
 such Contributor's behalf. Contributions do not include additions to the Program
 which: (i) are separate modules of software distributed in conjunction with the
 Program under their own license agreement, and (ii) are not derivative works of
 the Program.  "Contributor" means any person or entity that distributes the
 Program.
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 "Licensed Patents" mean patent claims licensable by a Contributor which are
 necessarily infringed by the use or sale of its Contribution alone or when
 combined with the Program.
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 "Program" means the Contributions distributed in accordance with this Agreement.
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 including all Contributors.
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 Recipient a non-exclusive, worldwide, royalty-free copyright license to
 reproduce, prepare derivative works of, publicly display, publicly perform,
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