[PATCH] Clarify proxy modules $proxy_host variable content

[Maxim Dounin]

Hello!

On Tue, Dec 04, 2018 at 05:00:10PM +0100, Jack Henschel wrote:

> From the current documentation it was not immediately obvious (at least
> to me and my colleague) that nginx does not set the $proxy_host variable
> to the hosts specified in an upstream block, but literally uses the name
> used in the proxy_pass directive.
> 
> Maxim Dounin has explained to me the reason for this [1], nevertheless I
> think it is worthwhile explicitly adding this behavior to the documentation.

Thank you for your patch.  It looks too explicit for me though.

-- 
Maxim Dounin
http://mdounin.ru/