Juri Linkov <juri@linkov.net> writes:

>>> Another approach could be to offer a C-h binding that opens a help
>>> window that describes the possible options and briefly links to the
>>> customization entry point that removes the prompt permanently.
>>
>> Yeah, that sounds like a good idea.
>
> I agree, this is really the best idea.

OK, I've implemented it in the attached patch.  Suggestions
welcome.