nginx virtualhost: set client_max_body_size.

templates/nginx_wordpress.conf.j2

@@ -88,6 +88,13 @@ server {
         real_ip_header X-Forwarded-For;
         {% endif %}
 
+
+        {% if item.max_body is defined %}
+        client_max_body_size {{ item.max_body }};
+        {% else %}
+        client_max_body_size {{ nginx_client_max_body_size }};
+        {% endif %}
+
         # redirect server error pages to the static page /50x.html
         #
         error_page   500 502 503 504  /50x.html;