As discussed in issue #160 , blacklist entries can indeed currently not
be "complete" regular expressions, but must be structured as a domain
part, a separator character ('/'), and a path part.
<li>domain and path<ahref="https://docs.oracle.com/javase/8/docs/api/java/util/regex/Pattern.html"target="_blank">regular expressions</a> separated by a '/' (slow)</li>