[ic] missing.html and a 404

[Grant]

Some search engine spiders keep coming around looking for the same
pages that send them to my missing.html page again and again.  I was
wondering if missing.html returns a 404, and I found the following in
the docs:

[tag op=header]Status: 404 missing[/tag]

But If I add that to missing.html I get a blank page (and probably a
404).  Does the missing.html page always return a 404 so robots know
what's up?

- Grant