RE: ffap highlighting persists

[Drew Adams]

    Below is a patch that allows the user to turn off ffap highlighting.
    Actually, it was possible to do this without this patch because
    ffap.el checks for the face `ffap' with (facep 'ffap), but this
    possibility is hidden from users.  A standard way to customize this
    is to define faces with `defface':

Again - We might want to distinguish the face from the mouse-face
highlighting, in this discussion.

I personally will turn off all such highlighting (given the option), but
some people might, say, like to keep the mouse-face highlighting but not the
face highlighting.

There is also the question of persistence - some people might want the
highlighting temporarily, but be able to turn it off somehow later. If ffap
were made into a minor mode, exiting it might also turn off the highlighting
(since it would then be disabled).