ProxyAddress directive in om_http module

Hello! First time nxlog user here.

Looking at the docs:

https://nxlog.co/documentation/nxlog-user-guide-full#om_http_config

It would seem to indicate the availability of a ProxyAddress directive but when I populate the nxlog.conf file with one, I receive an error that the ProxyAddress keyword is invalid:

2019-08-27 17:34:40 ERROR invalid keyword: ProxyAddress at C:\Program Files (x86)\nxlog\conf\nxlog.conf:91
2019-08-27 17:34:40 ERROR module 'http' has configuration errors, not adding to route '1' at C:\Program Files (x86)\nxlog\conf\nxlog.conf:96
2019-08-27 17:34:40 WARNING not starting unused module http
2019-08-27 17:34:40 INFO nxlog-ce-2.10.2150 started

Can anyone point me in the right direction on this one?

Much appreciated!!!

-Ryan