Relicensing Nautilus to GPLv3+

[Ernestas Kulik <ernestask gnome org>]

(Attempt no. 2, since Geary hates me)

Hi,

As the current licensing situation in Nautilus is quite complicated, I
and Carlos are planning a move to relicense the entire codebase to
GPLv3+.

The codebase has files under several licenses: LGPLv2+, GPLv2+ and
GPLv3+, the latter implicitly making the project be licensed under its
terms, so our options are quite limited here.

The situation wrt extensions is also not entirely clear, as the
extension library is LGPLv2+ with Nautilus being GPLv2+, which in turn
disallows loading non-free extensions. Given the fact that it is not
meant to be a generic mechanism for loading extensions, I feel like
relicensing it without much consideration is reasonable.

If there are no objections, we will make the switch in the following
week, most likely.

Regards,
Ernestas