[NETFILTER] remove the reference to ipchains from Kconfig

It is time to move on :-)

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

Index: linux-2.6.git/net/Kconfig
===================================================================
--- linux-2.6.git.orig/net/Kconfig	2006-11-28 15:07:50.000000000 +0100
+++ linux-2.6.git/net/Kconfig	2006-11-28 15:08:15.000000000 +0100
@@ -75,7 +75,7 @@ config NETWORK_SECMARK
 	  If you are unsure how to answer this question, answer N.
 
 menuconfig NETFILTER
-	bool "Network packet filtering (replaces ipchains)"
+	bool "Network packet filtering framework (Netfilter)"
 	---help---
 	  Netfilter is a framework for filtering and mangling network packets
 	  that pass through your Linux box.