RPAFproxy_ips are not properly filtered out

description
=========
In case of multiple proxies in series, mod_rpaf does not take the correct ip address to fill out REMOTE_ADDR.
It takes the _last_ ip address,
 it shoud however take the _last_ ip that is not RPAFproxy_ips.

steps to reproduce
===============

rpaf.conf
<IfModule mod_rpaf-2.0.c>
RPAFenable On
RPAFsethostname On
RPAFproxy_ips 127.0.0.1 ::1
</IfModule>

Have two proxies in series, both adjust header X-Forwarded-For
The https header arriving at apache is: X-Forwarded-For: 92.243.6.7, 127.0.0.1

expected result
=============
REMOTE_ADDRES = 92.243.6.7
It should not take 127.0.0.1 as that is in RPAFproxy_ips

actual result
==========
REMOTE_ADDRESS = 127.0.0.1

It does work correctly when only a single proxy is used.
So when the header is X-Forwarded-For: 92.243.6.7 -> REMOTE_ADDRESS is set correctly

version
======
ubuntu LTS 12.04
libapache2-mod-rpaf 0.6-2

details
======

It seems an old bug (fixed in 5.3) somehow reappered.

 -- Pavel V. Rochnyack <email address hidden> Mon, 02 Nov 2009 13:15:17 +0600

libapache2-mod-rpaf (0.5-3) unstable; urgency=low
....
  * Get last address in the header which is not in RPAFproxy_ips. Closes: #377190.