Copyright for python-regex source package in Focal

Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: regex
Source: https://bitbucket.org/mrabarnett/mrab-regex

Files: *
Copyright: 2009-2011 Matthew Barnett 
License: PSF

Files: debian/*
Copyright: 2012-2019 Sandro Tosi 
License: PSF

License: PSF
 PYTHON SOFTWARE FOUNDATION LICENSE VERSION 2
 --------------------------------------------
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 1. This LICENSE AGREEMENT is between the Python Software Foundation
 ("PSF"), and the Individual or Organization ("Licensee") accessing and
 otherwise using this software ("Python") in source or binary form and
 its associated documentation.
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 2. Subject to the terms and conditions of this License Agreement, PSF hereby
 grants Licensee a nonexclusive, royalty-free, world-wide license to reproduce,
 analyze, test, perform and/or display publicly, prepare derivative works,
 distribute, and otherwise use Python alone or in any derivative version,
 provided, however, that PSF's License Agreement and PSF's notice of copyright,
 i.e., "Copyright (c) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
 Python Software Foundation; All Rights Reserved" are retained in Python alone or
 in any derivative version prepared by Licensee.
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 3. In the event Licensee prepares a derivative work that is based on
 or incorporates Python or any part thereof, and wants to make
 the derivative work available to others as provided herein, then
 Licensee hereby agrees to include in any such work a brief summary of
 the changes made to Python.
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 4. PSF is making Python available to Licensee on an "AS IS"
 basis.  PSF MAKES NO REPRESENTATIONS OR WARRANTIES, EXPRESS OR
 IMPLIED.  BY WAY OF EXAMPLE, BUT NOT LIMITATION, PSF MAKES NO AND
 DISCLAIMS ANY REPRESENTATION OR WARRANTY OF MERCHANTABILITY OR FITNESS
 FOR ANY PARTICULAR PURPOSE OR THAT THE USE OF PYTHON WILL NOT
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 FOR ANY INCIDENTAL, SPECIAL, OR CONSEQUENTIAL DAMAGES OR LOSS AS
 A RESULT OF MODIFYING, DISTRIBUTING, OR OTHERWISE USING PYTHON,
 OR ANY DERIVATIVE THEREOF, EVEN IF ADVISED OF THE POSSIBILITY THEREOF.
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 trademarks or trade name in a trademark sense to endorse or promote
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 8. By copying, installing or otherwise using Python, Licensee
 agrees to be bound by the terms and conditions of this License
 Agreement.