Copyright for python-spake2 source package in Focal

Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: spake2
Upstream-Contact: Brian Warner 
Source: https://pypi.python.org/pypi/spake2

Files: *
Copyright: 2015 Brian Warner
License: Expat

Files: src/spake2/six.py
Copyright: 2010-2015 Benjamin Peterson
License: Expat

Files: debian/*
Copyright: held by the contributors mentioned in debian/changelog
License: Expat

License: Expat
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