Bug#827337: apt-show-versions: option to hide packages that are at the right version based on pinning upgradeable

[Paul Wise]

What *is* the proper way of figuring out what the default release is?
Or should we have a --ignore flag that would ignore a certain suite?

APT developers: we could use your help on this bug report:

https://bugs.debian.org/827337

Using the APT Perl libraries, what is the right way to determine if the
currently installed version of a package matches the default release
and pinning setup configured by the system or if the installed version
was manually updated to a non-default release?

I guess this is pretty complicated, since different pinning value
ranges have different meanings and this should affect the results.