anchor.diff:      add_header X-Mirror-Upstream-Response-Time $upstream_response_time;
       add_header X-Mirror-Status $upstream_cache_status;
       add_header Host $host;
  -    access_log '/var/log/nginx/lancache/access.log' cachelog;
     }
     location @mirror {
         proxy_store on;
  
positive.code:       add_header X-Mirror-Upstream-Status $upstream_status;
        add_header X-Mirror-Upstream-Response-Time $upstream_response_time;
        add_header X-Mirror-Status $upstream_cache_status;
        access_log '/var/log/nginx/lancache/access.log' cachelog;
    }
  
negative.code:   }
    location /depot/ {
      try_files $uri @mirror;
    }
    location / {
      proxy_next_upstream error timeout http_404;
  