Bug#969762: warn about invalid field names in debian/upstream/metadata

[Felix Lechner <felix.lechner@lease-up.com>]

Hi Jelmer,

> lintian-brush can use this as a signal to fix typos in field names

I'll try to track down a list of valid names and will happily implement it.

In a pinch, you could even do it yourself. The tag
upstream-metadata-field-present [1], which as a classification tag is
not shown for packages on the website but is available in UDD, gives
you the verbatim field names found. Like me, you just need a list of
valid names to determine those that are bogus. They are already only
one SQL query away!

It is what happens when Lintian provides its scanning results to the
world, as discussed in your other Bug#969769.

Kind regards
Felix Lechner

[1] https://lintian.debian.org/tags/upstream-metadata-field-present.html