Added the dot, rebased&squashed.

Edit: There are two other lines in the output of bin/bitcoind --help that end with key=value. where the dot does not belong to the value, but marks the end of the sentence:

Equivalent to -chain=signet.
Equivalent to -chain=test. (even at the end of the paragraph, like it is in this PR the case, too)

(in src/chainparamsbase.cpp)

The following sections might be updated with supplementary metadata relevant to reviewers and maintainers.

Conflicts

Reviewers, this pull request conflicts with the following ones:

• doc: tor.md and -onlynet help updates #20757 (doc: tor.md and -onlynet help updates by jonatack)

If you consider this pull request important, please also help to review the conflicting pull requests. Ideally, start with the one that should be merged first.

I would appreciate if this could be merged now, so it is done.

🐙 This pull request conflicts with the target branch and needs rebase.

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The chaotic networking behavior is now reasonably documented with #20757 I guess, closing.

@wodry I'm sorry, I overlooked this pull when consolidating ideas for #20757, otherwise would have been happy to look at including it. Maybe it's complementary.

@jonatack Thanks, that's nice of you, nevermind, my impression is that the subject of Tor network and it's documentation is in good hands of you right now. There was some dynamic changes currently in this subject, I lost overview and only use release versions, so I do not know the current (master branch) behavior. I would check later time with new releases maybe again. Feel free to check if the issue I mentioned here is of any value anymore maybe worth to include :-)