please test Varnish "Vary:" matching

[Poul-Henning Kamp]

I have implemented a very efficient and simple "Vary:" processing
in varnish(-trunk) now.

The simplicity is based on a number of assumptions which I have
very little supporting evidence for, apart from my informed guesses.

Please read:
	http://varnish.projects.linpro.no/wiki/ArchitectureVary

And report back whether it works for you or not...

Poul-Henning


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