added generic TLS application data handler and specific EAP-TTLS instantiation

src/libcharon/plugins/eap_tls/eap_tls.c

@@ -433,7 +433,8 @@ static eap_tls_t *eap_tls_create(identification_t *server,
 		.is_server = is_server,
 	);
 	/* MSK PRF ASCII constant label according to EAP-TLS RFC 5216 */
-	this->tls = tls_create(is_server, server, peer, "client EAP encryption");
+	this->tls = tls_create(is_server, server, peer, "client EAP encryption",
+						   NULL);
 
 	return &this->public;
 }