Minor FAQ updates

[Robert J. Hansen]

> And perhaps readers of the FAQ should be made aware (in the same
> section) that the old advice is no longer considered good practice,
> since the old advice is obviously all over the internet.

I agree, but this will be a substantive change.  For that reason I'm
folding it into the substantive edits I'm making over the weekend, as
opposed to the review-and-typo-hunt of this morning.  :)