Relayd & multiple X-Forwaded-For IP's

[Keith]

There must be two upstream firewalls from our servers that are adding 
X-Forwarded-For IP addresses. We curently have

header change "X-Forwarded-For" to "$REMOTE_ADDR"
but this is not giving us the IP that we want so we are trying to figure 
out how to get the other IP from the header. Is there a way to do this 
in Relayd ?

Thanks
Keith