symlink issues with php-fpm

# symlink
            fastcgi_param DOCUMENT_ROOT $realpath_root;

permits to have the real path with the current symlink while deploying with Capifony (evoiding restarting php-fpm)

Author: kendrick-k

cookbook/configuration/web_server_configuration.rst

@@ -269,13 +269,17 @@ The **minimum configuration** to get your application running under Nginx is:
             fastcgi_split_path_info ^(.+\.php)(/.*)$;
             include fastcgi_params;
             fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
+            # symlink
+            fastcgi_param DOCUMENT_ROOT $realpath_root;
         }
         # PROD
         location ~ ^/app\.php(/|$) {
             fastcgi_pass unix:/var/run/php5-fpm.sock;
             fastcgi_split_path_info ^(.+\.php)(/.*)$;
             include fastcgi_params;
             fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
+            # symlink
+            fastcgi_param DOCUMENT_ROOT $realpath_root;
             # Prevents URIs that include the front controller. This will 404:
             # http://domain.tld/app.php/some-path
             # Remove the internal directive to allow URIs like this