doc: Update command line help for -printtoconsole and -debuglogfile (satwo) #13614

This is a rebased version of #13589 with the changes to the 0.16.x release notes removed.

#13004 changed the default behavior for printtoconsole but this has not been reflected in the command line help.

This fixes the description of -printtoconsole to reflect this change, and also provides the user with missing information on how to explicitly disable logging to debug.log.

At present I have made the latter update to two separate places (-printtoconsole and -debuglogfile) because a user looking for information on how to disable logging is probably going to look in the "Debugging/Testing Options" section. Moving -debuglogfile from the "General" options category to the "Debugging/Testing" section could potentially remove the need for this redundancy but may be out of the scope of this PR.

So no release notes of #13004?

@promag I was going to say the same. I intended to move them to doc/release-notes.md per @laanwj 's suggestion; is there a way I could still do that?

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@laanwj 's suggestion; is there a way I could still do that?

Yes, at this point I'd recommend to make a new PR—one that does the release notes update only.