This allows projects that are strictly "GPLv2
only" to use WinDivert without licensing issues.
See the FSF's compatibility matrix here:
https://www.gnu.org/licenses/gpl-faq.en.html
This change does not affect existing projects
that can continue to use the LGPLv3 as before.
Also, bump the WinDivert version to 1.4.1.
This hardens WinDivert against other drivers that
attempt to modify packets after they were blocked
& absorbed by WinDivert, leading to BSODs. This
is also a fix for issue #110.