ipsec: new api for sa ips and ports updates

Useful to update the tunnel paramaters and udp ports (NAT-T) of an SA
without having to rekey. Could be done by deleting and re-adding the
SA but it would not preserve the anti-replay window if there is one.
Use case: a nat update/reboot between the 2 endpoints of the tunnel.

Type: feature
Change-Id: Icf5c0aac218603e8aa9a008ed6f614e4a6db59a0
Signed-off-by: Arthur de Kerhor <arthurdekerhor@gmail.com>
diff --git a/src/vnet/ipsec/ipsec_test.c b/src/vnet/ipsec/ipsec_test.c
index f143619..16d8642 100644
--- a/src/vnet/ipsec/ipsec_test.c
+++ b/src/vnet/ipsec/ipsec_test.c
@@ -307,6 +307,12 @@
 }
 
 static int
+api_ipsec_sad_entry_update (vat_main_t *vat)
+{
+  return -1;
+}
+
+static int
 api_ipsec_tunnel_protect_update (vat_main_t *vat)
 {
   return -1;