Policy on inc

As outlined during our annual meeting at DebConf19 (no report yet, but you can check the gobby notes, or the export at [0]), I worked on this issue during our DebCamp sprint [1] [2].

Since it is apparently quite simple to fix in many cases beside Module::Install, I started to fix a bunch of them and started to draft a (pkg-perl) policy on this.

The policy change proposal lies in the branch policy_on_inc on salsa [3]

The idea is to finalize the change wording, and to write a lintian check to check this. The check would probably not most exception at first and just draw attention to the issue.

Please have a look on the proposed change and give feedback!

[0] https://gobby.debian.org/export/debconf19/bof/pkg-perl [1] https://perl-team.pages.debian.net/docs/sprint-debcamp2019/report-debcamp2019.html [2] https://gobby.debian.org/export/Teams/Perl/Embedded_modules_in_inc [3] https://salsa.debian.org/perl-team/perl-team.pages.debian.net/compare/master...policy_on_inc