Bug#612610: lintian: should suggest switching to 3.0 (quilt)

[Niels Thykier <niels@thykier.net>]

Hi,

I am not sure we can in general promote the use of 3.0 (quilt) over 1.0
via Lintian at the moment[1].

Though I noticed that people are writing their own tools to extract
things like "what source format is used" or "what build systems are
used".  With #359059 being fixed in 2.5.12, perhaps it is worth for us
to consider if Lintian could be used for more than "mere" flaw
reporting.  Like adding a new "kind" of tag that is not a "flaw" but
simply a "property" of the package[2].

While it would not directly solve your/Luacs's request for promoting a
switch to 3.0 (quilt), it would still report which source formats are
used (and would be importable into UDD).  It is also quite possible that
some of the metrics on mentors.d.n could be replaced by this new
"property" tag[3].

~Niels

[1] Basically it is the same reasons as mentioned in #702671.

[2] Originally I considered using "informational tag" here, but I
figured it would be confused with "I" tags.

[3] I doubt the current ones will be replaced, but one can hope that
future metrics would be written as such a tag.