[NETFILTER]: remove the reference to ipchains from Kconfig

It is time to move on :-)
Signed-off-by: NPablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: NPatrick McHardy <kaber@trash.net>

net/Kconfig

@@ -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.