Bug#860023: libdebian-source-perl: Rejects valid field names based on letter case

[Alex Muntada]

Ben Finney:

> So, with the above example, if each those field names were accepted,
> and they all map to the Perl object accessor ‘Vcs_Git’, and other Perl
> code still needed to spell the *accessor* name that way, that would
> IMO be compliant with Policy and would resolve this bug report.

The patch provided below accepts any valid field ignoring case
by using the canonical name instead, so VCS-Git, vCS-gIT, etc.
will end up being Vcs-Git. Would that be compliant with Policy?

Cheers!
Alex

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