testing: Add ikev2/net2net-dnscert scenario

testing/tests/ikev2/net2net-dnscert/hosts/moon/etc/strongswan.conf

@@ -0,0 +1,20 @@
+# /etc/strongswan.conf - strongSwan configuration file
+
+charon {
+  load = sha1 sha2 md5 aes des hmac gmp dnskey pem pkcs1 pubkey unbound dnscert random nonce x509 curl kernel-netlink socket-default stroke updown
+
+  plugins {
+    dnscert {
+      enable = yes
+    }
+  }
+}
+
+libstrongswan {
+  plugins {
+    unbound {
+      # trust_anchors = /etc/ipsec.d/dnssec.keys
+      # resolv_conf = /etc/resolv.conf
+    }
+  }
+}