Adding -b (buffer size) parameter to varnishtest

[Poul-Henning Kamp]

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In message <CAJV_h0bzK=0np1qPUF6AQmVM9SFfVQ80CkgFREWQiSKf4PuX5Q at mail.gmail.com>
, Federico Schwindt writes:

>I've run into this many times and I've hacked varnishtest so I'd like to
>see this in.

I'm very much for the patch, (with the VNUM change I requested).

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
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Never attribute to malice what can adequately be explained by incompetence.