blacklistd has been renamed to blocklistd. While at it,
add an URL to the man page.
currently can result in client requests to config.privoxy.org on the
Internet which may not be desirable.
-150) Add blacklistd support.
+150) Add blocklistd support (https://man.netbsd.org/blocklistd.8).
151) Let the dok-tidy target work cross-platform without introducing
a ton of white-space changes that hide the content changes.