Support resetting connections tied to any nonexistent address.

Bug: 15414453
Change-Id: Ibf1f052e12b88838a328148e25817a96f10d50f5
diff --git a/include/netutils/ifc.h b/include/netutils/ifc.h
index 9a8b282..3b27234 100644
--- a/include/netutils/ifc.h
+++ b/include/netutils/ifc.h
@@ -36,6 +36,7 @@
 
 #define RESET_IPV4_ADDRESSES 0x01
 #define RESET_IPV6_ADDRESSES 0x02
+#define RESET_IGNORE_INTERFACE_ADDRESS 0x04
 #define RESET_ALL_ADDRESSES  (RESET_IPV4_ADDRESSES | RESET_IPV6_ADDRESSES)
 extern int ifc_reset_connections(const char *ifname, const int reset_mask);