Use online block lists

[jmlich]

There are much more features in SaifishOS blocker called phonehook (e.g. checking with online sources):

https://github.com/omnight/phonehook
https://github.com/omnight/phonehook-sources

or

https://sourceforge.net/p/scumstopper/code/ci/master/tree/

It have compatible license and it is written in c++/qml