Bug#574293: lintian: Add check for missing Vcs-* headers (experimental or pedantic)

[Jari Aalto <jari.aalto@cante.net>]

Russ Allbery <rra@debian.org> writes:
>> - Sometimes, developer may have forgot to add Vcs-* headers, when lintian
>>   wasn't there to notify about them.
>
> There are experienced and well-respected Debian developers who do not use
> any VCS system

Sure, but in experimental form (X), it would be useful to catch
attention of those userss that use VCS, who forget to add it to
debian/control. Those messages wouldn't be seen unless
--display-experimental optio is in effect.

Jari