Copyright for flask-oldsessions source package in Bionic

Format: http://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: Flask-OldSessions
Upstream-Contact: Armin Ronacher 
Source: https://github.com/mitsuhiko/flask-oldsessions

Files: *
Copyright: 2012 Armin Ronacher 
License: BSD-3-Clause

Files: debian/*
Copyright: 2016 Ximin Luo 
License: BSD-3-Clause

License: BSD-3-Clause
 On Debian systems, the complete text of the BSD 3 Clause License can
 be found in the file `/usr/share/common-licenses/BSD', replacing
 references to the University of California with the appropriate
 copyright holder.