[PATCH] use backends only with use_backend directive

[PATCH] use backends only with use_backend directive

Hello,

As it is possible to use the same name for two proxies, make sure that
use_backed & friends does not match wrong proxy when used with use_backend/
default_backend/setbe. For example, without this patch, when there is a
backend and frontend with the same name (first backend and then frontend
trying to use specific backend), the application will likely try to use
frontend instead of backend, complaining loudly about a loop.

Best regards,

                                 Krzysztof Oledzki