Re: URL not following some 302 redirects after recent changes

[Richard Stallman]

    > Here's one idea.  Instead of setting the sentinel temporarily to nil,
    > set it temporarily to `sentinel-temporarily-inhibited'.  That would be
    > ignored just as nil is ignored.

    > On restoring the sentinel, if its current value isn't
    > `sentinel-temporarily-inhibited', just discard the old value instead
    > of restoring it.

    Why can't we do the same thing with nil?

nil as the value of the sentinal has a meaning already.
It can't mean "do restore the saved value".
What if a sentinel sets the sentinel to nil
meaning "turn off the sentinel"?