title: getting error while using lua with nginx
body: <p>I am very new to nginx and lua .i have installed Openresty .
  below is my code in nginx.conf file .</p>
  
  <pre>
  server{
        location /hellolua {
        default_type 'text/plain';
          content_by_lua '        local name = ngx.var.arg_name or "Anonymous"
          ngx.say("Hello, ", name, "!")    ';
          }
         }
  </pre>
  
  <p>When i am running <pre>sudo service nginx start</pre> i am getting error <pre>Starting nginx: nginx: [emerg] unknown directive "content_by_lua" in /etc/nginx/nginx.conf:24
  nginx: configuration file /etc/nginx/nginx.conf test failedt</pre>
  Please let me know what i am missing .</p>