Using anti_ddos_challenge.lua in openresty, and testing with slowhttptest

[springleo]

when run using the https://github.com/shekyan/slowhttptest
both slowbody and slowheaders fail miserably.
Service becomes unavailable within first 5 seconds and remains that way until the test finishes/timesout.
I must be missing something very obvious.

Attached is the nginx.conf
nginx.zip

thanks in advance.