Please include environment variable for XFF

[fauxserve]

My ingress requires me to use a */jamfpro URL scheme, which requires me to set x-forwarded-for in the tomcat server xml file. In order to do this, I need to hack it with an init container. This is not the end of the world, but it would be nice to have a supported mechanism.

P.S. - Great work on this so far. Thanks.