send reason along with backend request

[Hugo Cisneiros (Eitch)]

On Sun, Dec 11, 2011 at 11:47 PM, AD <straightflush at gmail.com> wrote:
> you should be able to add a req.http.header in your vcl_fetch.  I dont
> believe vcl_fetch gets called unless you are in a cache_miss and you need to
> contact the backend.

In vcl_fetch varnish already contacted the backend and fetched the
answer. This is why beresp.* variable is already there. You can add
headers before the backend request on vcl_miss or vcl_hit (in your
case, vcl_miss).

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