zebra: IPv4 MP-BGP Routes addition and deletion

This patch contains the following:
1. Addition of IPv4 SAFI_MULTICAST BGP routes into the RTM's RIB.
2. Deletion of IPv4 SAFI_MULTICAST BGP routes from the RTM's RIB.
diff --git a/zebra/rtread_getmsg.c b/zebra/rtread_getmsg.c
index 3e065c6..81bf0de 100644
--- a/zebra/rtread_getmsg.c
+++ b/zebra/rtread_getmsg.c
@@ -90,7 +90,7 @@
 	gateway.s_addr = routeEntry->ipRouteNextHop;
 
 	rib_add_ipv4 (ZEBRA_ROUTE_KERNEL, zebra_flags, &prefix,
-		      &gateway, NULL, 0, 0, 0, 0);
+		      &gateway, NULL, 0, 0, 0, 0, SAFI_UNICAST);
 }
 
 void