ignore query param in req.hash

[Poul-Henning Kamp]

In message <CANZWjw4M_yPYcAkfvJLrjmfkuVvbuYkirS8Xq4crGAtkAZROJQ at mail.gmail.com>
, AD writes:

>what is the cleanest way to ignore a single query param in the cache key
>(req.hash) without having to modify req.url ? 

Use regsub() to strip it, something like:

	hash_data(regsub(req.url, "[?].*", ""));


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