EllisLab/CodeIgniter — pull request #1640 by thecrypticace (2012-07-20 22:41:24+00:00)
Title: Added support for IP Address Range Masks to the Proxy IPs config option

Support for IP Address range masks like 192.168.137.0/24 or 192.168.0.0/16 have been added to the $config['proxy_ips'] setting.