avoid [emerg] 8878#8878: mkdir() "/var/lib/nginx/body" failed (13: Permission denied)

testsuite

@@ -123,6 +123,7 @@ http {
  default_type text/plain;
  ssl_protocols TLSv1.2;
  ssl_prefer_server_ciphers on;
+ client_body_temp_path body;
  server {
   listen $ip:4433 ssl;
   server_name test.example;