Limit IP req/s excl bots

[SplitIce]

Does anyone know if there is any truth to this blog post:
http://gadelkareem.com/2012/03/25/limit-requests-per-ip-on-nginx-using-httplimitzonemodule-and-httplimitreqmodule-except-whitelist/

And if so where about in the code its implemented? I was trying to find out
if its possible to use a map to control limit req/s limits but I still cant
find the code that does what that article says is possible.

Regards,
Mathew
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