[IPV6]: ROUTE: Add experimental support for Route Information Option in RA (RFC4191).

Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/ipv6/Kconfig

@@ -49,6 +49,14 @@ config IPV6_ROUTER_PREF
 
 	  If unsure, say N.
 
+config IPV6_ROUTE_INFO
+	bool "IPv6: Route Information (RFC 4191) support (EXPERIMENTAL)"
+	depends on IPV6_ROUTER_PREF && EXPERIMENTAL
+	---help---
+	  This is experimental support of Route Information.
+
+	  If unsure, say N.
+
 config INET6_AH
 	tristate "IPv6: AH transformation"
 	depends on IPV6