bug in esi:include handling (with patch)

[Poul-Henning Kamp]

In message <19203.62532.605771.461417 at bio-iisrv1.bio.ic.ac.uk>, Bob MacCallum w
rites:
>
>Oh, well, at least great minds think alike.
>
>Are includes like this supposed to work:
>
><esi:include src="http://some.other.site/stuff" />

It only works if you have a backend defined for that server.

Look at bin/varnistest/tests/e00006.vtc for an example.

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