Copyright for libcsfml source package in Lunar

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

Files: *
Copyright: 2007-2015 Laurent Gomila 
License: Zlib

Files: debian/*
Copyright: 2008,2009 Christoph Egger 
           2013-2018 James Cowgill 
License: Zlib

License: Zlib
 This software is provided 'as-is', without any express or implied warranty.
 In no event will the authors be held liable for any damages arising from
 the use of this software.
 .
 Permission is granted to anyone to use this software for any purpose,
 including commercial applications, and to alter it and redistribute it
 freely, subject to the following restrictions:
 .
 1. The origin of this software must not be misrepresented; you must not claim
    that you wrote the original software. If you use this software in a product,
    an acknowledgment in the product documentation would be appreciated but is
    not required.
 .
 2. Altered source versions must be plainly marked as such, and must not be
    misrepresented as being the original software.
 .
 3. This notice may not be removed or altered from any source distribution.