purge_hash and regular expressions

[Poul-Henning Kamp]

In message <gpdbov$a5n$1 at ger.gmane.org>, Lapo Luchini writes:

>Hi there.
>I think purge_hash is quite nice, but to be easier to use from VCL code
>it would be nice to have a function to "regexp-ize" a constant string,

In the new purge stuff, you can use comparisons in addition to regexp
matching:

	purge  req.url == "index.html" && req.http.host ~ "foo.com"

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