EllisLab/CodeIgniter — pull request #1807 by myersem2 (2012-09-17 06:25:02+00:00)
Title: Fix for multiple ips via HTTP_X_FORWARDED_FOR

Since HTTP_X_FORWARDED_FOR can pass more than one IP they may be separated by a ',' this will correct the issues if this is the case.

See for more info on HTTP_X_FORWARDED_FOR
http://en.wikipedia.org/wiki/X-Forwarded-For