Correcting of the license tag for the lightning package.

[Jochen Schmitt <Jochen herr-schmitt de>]

Hello,

after a review of the license text of the lightning package initiate by
the discussion about
versioned license tags, I have to find out, that I have to change the
license tag of this package
from LGPL to GPLv2.

Best Regards:

Jochen Schmitt