Copyright of debian/*
I have noticed some packages using the newer machine-readable copyright
format, but not specifying any copyright for debian/*
To give an example based on the docs
Copyright: 1975-2010 Ulla Upstream
Copyright: 2010 Manuela Manpager
Let us assume that Ulla Upstream has nothing to do with the contents of
debian/* (and that e.g. the git history lets us be sure of that).
What does that mean about the copyright status of debian/* ? If I want
to re-use a file therein in another package, can I do so?