Copyright for ruby-multibitnums source package in Oracular

Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: ruby-multibitnums
Source: http://www.gfd-dennou.org/library/ruby/products/multibitnums/multibitnums.html

Files: *
Copyright: 2011 Takeshi Horinouchi 
                GFD Dennou Club(http://www.gfd-dennou.org/
License: BSD-2-clause

Files: debian/*
Copyright: 2011 Youhei SASAKI 
           2013,2016,2020 Cédric Boutillier 
           2014 Jonas Genannt 
           2019 Utkarsh Gupta 
           2022 HIGUCHI Daisuke (VDR dai) 
License: BSD-2-clause

License: BSD-2-clause
 Redistribution and use in source and binary forms, with or without
 modification, are permitted provided that the following conditions are
 met:
 .
    1. Redistributions of source code must retain the above copyright
       notice, this list of conditions and the following disclaimer.
 .
    2. Redistributions in binary form must reproduce the above copyright
       notice, this list of conditions and the following disclaimer in
       the documentation and/or other materials provided with the
       distribution.
 .
 THIS SOFTWARE IS PROVIDED BY GFD DENNOU CLUB AND CONTRIBUTORS ``AS IS''
 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL  OR
 CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 .
 The views and conclusions contained in the software and documentation
 are those of the authors and should not be interpreted as representing
 official policies, either expressed or implied, of Takeshi Horinouchi
 and GFD Dennou Club.