Bug#692616: lintian: Check for the non-free JSON license in source packages

[Niels Thykier <niels@thykier.net>]

Package: lintian
Severity: wishlist

The non-free JSON license keeps re-appearing in main[0].  It would be
helpful if Lintian could check for its appearance in the source
package.  The license appears to be very trivial to identify thanks to
the non-free line:

  """ The Software shall be used for Good, not Evil. """

It is not enough to simply check the copyright file as it is usually
not explicitly present there (which is a separate RC bug in these
packages).

~Niels

[0] http://codesearch.debian.net/search?q=The+Software+shall+be+used+for+Good%2C+not+Evil