H4: TLSECName <name>
This directive specifies the curve to use for Elliptic Curve
-Diffie-Hellman ephemeral key exchange. This is required in order
+Diffie-Hellman ephemeral key exchange. This option is only needed
to use ECDHE-based cipher suites in OpenSSL. The names of supported
curves may be shown using the following command
> openssl ecparam -list_curves
+If it is omitted, OpenSSL will auto-negotiate the curve choice.
This directive is not used for GnuTLS.
For GnuTLS the curves may be specified in the ciphersuite.