new directive: proxy_next_tries N

[Maxim Dounin]

Hello!

On Tue, Apr 23, 2013 at 04:20:06PM -0400, duv wrote:

> Short description: Will attempt only N upstreams and then fail with last
> error
> 
> I didn't commit this to any trunk/branch,
> This is my first patch so I'm not sure how it goes. 
> I submitted a gist of it to:
> https://gist.github.com/shai-d/5446961
> 
> Hope you will find it useful.
> Shai Duvdevani.

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-- 
Maxim Dounin
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