Added php-FPM pool for backend services

CMS/Backend/nginx-siteBackend-unconfigured

@@ -25,7 +25,7 @@ location = /backend/netdata {
             include fastcgi_params;
             fastcgi_param SCRIPT_FILENAME $request_filename;
             fastcgi_split_path_info ^(.+\.php)(/.+)$;
-            fastcgi_pass unix:/var/run/php/phpPHPver-fpm.sock;
+            fastcgi_pass unix:/var/run/php/phpPHPver-fpm-Backend.sock;
             fastcgi_index index.php;
         }
     }