Further code optimizations

Signed-off-by: Przemek Stekiel <przemyslaw.stekiel@mobica.com>
diff --git a/ChangeLog.d/ffdh-tls-1-3.txt b/ChangeLog.d/ffdh-tls-1-3.txt
index d358f9b..c5d07d6 100644
--- a/ChangeLog.d/ffdh-tls-1-3.txt
+++ b/ChangeLog.d/ffdh-tls-1-3.txt
@@ -1,2 +1,6 @@
 Features
    * Add support for FFDH key exchange in TLS 1.3.
+     This is automatically enabled as soon as PSA_WANT_ALG_FFDH
+     and the ephemeral or psk-ephemeral key exchange mode are enabled.
+     By default, all groups are offered; the list of groups can be
+     configured using the existing API function mbedtls_ssl_conf_groups().