testing: Extended Botan scenarios

testing/tests/botan/rw-cert/hosts/dave/etc/strongswan.conf

@@ -5,7 +5,7 @@ swanctl {
 }
 
 charon-systemd {
-  load = random nonce sha1 sha2 aes hmac mgf1 pem pkcs1 x509 revocation constraints pubkey gmp curl kernel-netlink socket-default updown vici
+  load = random nonce sha1 sha2 aes curve25519 hmac mgf1 pem pkcs1 x509 revocation constraints pubkey gmp curl kernel-netlink socket-default updown vici
 
   rsa_pss = yes
 }