Bug#737843: manipulate unzip behavior

[Emmanuel Bourg]

Hi Osamu,

Thank you for the feedback. Adding optional unzip options to uscan isn't
uninteresting but that's a much larger goal than the issue I raised. I'm
just requesting that uscan doesn't change the content of the upstream
files, that's a reasonable expectation I think. This should be the
default behavior and packagers shouldn't have to set extra parameters to
achieve this.

Emmanuel Bourg