rpaf for Apache 2

1. Download http://stderr.net/apache/rpaf/download/

2. apxs -i -c -n mod_rpaf-2.0.so mod_rpaf-2.0.c

3. /etc/httpd/conf.d/rpaf.conf:

LoadModule rpaf_module modules/mod_rpaf-2.0.so
RPAFenable On
RPAFproxy_ips 127.0.0.1 127.0.0.2
RPAFsethostname On