Bug#1031849: Mention actual GitHub URL in copyright

[Dan Jacobson]

Package: libgeo-inverse-perl
Version: 0.07-1
File: /usr/share/doc/libgeo-inverse-perl/copyright

$ dlocate -L libgeo-inverse-perl|xargs zgrep -i github
/usr/share/doc/libgeo-inverse-perl/CONTRIBUTING.md:Fork repository on GitHub and submit a pull request.
/usr/share/doc/libgeo-inverse-perl/changelog.gz:  - Added GitHub repository
/usr/share/man/man3/Geo::Inverse.3pm.gz:Please open an issue on GitHub
/usr/share/perl5/Geo/Inverse.pm:Please open an issue on GitHub

Somewhere the actual GitHub URL should please be mentioned, e.g., in the
copyright file.

Above it says he "added the GitHub repository", but no exact URL is
given. OK, maybe I'll also remind him about that. No I won't, as we
are supposed to tell him on GitHub, but try as I might, I really can't
find it. So....... I give up!