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/connected.c b/zebra/connected.c
index 95399fa..8db2d36 100644
--- a/zebra/connected.c
+++ b/zebra/connected.c
@@ -189,7 +189,7 @@
     return;
 
   rib_add_ipv4 (ZEBRA_ROUTE_CONNECT, 0, &p, NULL, NULL, ifp->ifindex,
-	RT_TABLE_MAIN, ifp->metric, 0);
+	RT_TABLE_MAIN, ifp->metric, 0, SAFI_UNICAST);
 
   rib_update ();
 }
@@ -295,7 +295,7 @@
     return;
 
   /* Same logic as for connected_up_ipv4(): push the changes into the head. */
-  rib_delete_ipv4 (ZEBRA_ROUTE_CONNECT, 0, &p, NULL, ifp->ifindex, 0);
+  rib_delete_ipv4 (ZEBRA_ROUTE_CONNECT, 0, &p, NULL, ifp->ifindex, 0, SAFI_UNICAST);
 
   rib_update ();
 }