Handle the "X-Forwarded-For" header parameter for discovering client IP address when request comes via proxy/loadbalancer.

Handle the "X-Forwarded-For" header parameter for discovering client IP address when request comes via proxy/loadbalancer.
Actually better to use: http://docs.oracle.com/javase/1.5.0/docs/api/java/net/InetAddress.html#getByName%28java.lang.String%29