Copyright for lbfgsb source package in Focal

Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: L-BFGS-B
Files-Excluded: x.* ._* OUTPUTS/._* ../._Lbfgsb.3.0 linpack.f blas.f
Source: http://users.iems.northwestern.edu/~nocedal/lbfgsb.html
 The pristine upstream source contains prebuilt binaries and various metadata
 files, as well as unused copied of LINPACK and BLAS. These are removed.

Files: *
Copyright: Ciyou Zhu, Richard Byrd, Jorge Nocedal, Jose Luis Morales
License: BSD-3-clause

Files: debian/*
Copyright: 2013-2019 Gard Spreemann 
License: BSD-3-clause

Files: debian/tests/*.f90
Copyright: Ciyou Zhu, Richard Byrd, Jorge Nocedal, Jose Luis Morales
License: BSD-3-clause

License: BSD-3-clause
 Redistribution and use in source and binary forms, with or without
 modification, are permitted provided that the following conditions are met:
     * Redistributions of source code must retain the above copyright
       notice, this list of conditions and the following disclaimer.
     * 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.
     * Neither the name of the  nor the
       names of its contributors may be used to endorse or promote products
       derived from this software without specific prior written permission.
 .
 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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  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.