Review and document keyword filtering test
The keyword filtering test implemented here should be documented and reviewed:
https://gitweb.torproject.org/ooni-probe.git/blob/HEAD:/nettests/core/keyword_filtering.py
The keyword filtering test implemented here should be documented and reviewed:
https://gitweb.torproject.org/ooni-probe.git/blob/HEAD:/nettests/core/keyword_filtering.py