There remain some false positives, hits in test data, and `dir` use,
around 100 issues in total.
There is no plan to enforce badwords on tests.
Also:
- badwords.txt: let a few `manpage[s]` occurrences through
(in Perl code).
Closes#19541
Only actually needed servers should be listed and none is then implied
if no servers are listed.
Outputs a warning if "none" is still set as a server.
Closes#18466
