Add X448/Ed448 support to libssl

Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Kurt Roeckx <kurt@roeckx.be>
(Merged from https://github.com/openssl/openssl/pull/5470)
diff --git a/ssl/ssl_cert_table.h b/ssl/ssl_cert_table.h
index fd6a1ad..1376441 100644
--- a/ssl/ssl_cert_table.h
+++ b/ssl/ssl_cert_table.h
@@ -18,5 +18,6 @@
     {NID_id_GostR3410_2001, SSL_aGOST01}, /* SSL_PKEY_GOST01 */
     {NID_id_GostR3410_2012_256, SSL_aGOST12}, /* SSL_PKEY_GOST12_256 */
     {NID_id_GostR3410_2012_512, SSL_aGOST12}, /* SSL_PKEY_GOST12_512 */
-    {EVP_PKEY_ED25519, SSL_aECDSA} /* SSL_PKEY_ED25519 */
+    {EVP_PKEY_ED25519, SSL_aECDSA}, /* SSL_PKEY_ED25519 */
+    {EVP_PKEY_ED448, SSL_aECDSA} /* SSL_PKEY_ED448 */
 };