tor-control-port-filter by Tails changed significantly since Whonix forked it.

Merge https://git-tails.immerda.ch/tails/plain/config/chroot_local-includes/usr/local/lib/tor-controlport-filter?h=feature/7870-include_onionshare into https://github.com/Whonix/control-port-filter-python/blob/master/usr/lib/tor-controlport-filter. (Of course keep the enhancements by Whonix.)

That way the delta gets smaller. And makes it easier to get Whonix's enhancement merged into Tails' one so both projects can share the very same tor-control-port-filter code.

When done: anonym of Tails would like to be informed.