DRAWBRIDGING in APACHE PKI announce

HTTP/1.1 200 OK
Server: nginx/1.8.1
Date: Sun, 22 Aug 2021 18:49:09 GMT
Content-Type: text/html TRAILING
Content-Length: 1
Last-Modified: Mon, 16 Sep 2019 02:22:48 GMT
Connection: close
ETag: “5d7ef1f8-1”  Rotational easy edit
Accept-Ranges: bytes

add callback rbl robot in the wild; BadRobot; BrokenClockworks