ovs-monitor-ipsec: Allow IKE fragmentation

Some (broken) firewalls do not properly pass UDP fragments, which will
prevent IKE from completing.  This commit enables the racoon option to
allow application-level fragmenting and allow security associations to
be created.

debian/ovs-monitor-ipsec

@@ -83,6 +83,7 @@ path certificate "%s";
     cert_entry = """remote %s {
         exchange_mode main;
         nat_traversal on;
+        ike_frag on;
         certificate_type x509 "%s" "%s";
         my_identifier asn1dn;
         peers_identifier asn1dn;