SSL_CTX_set_tmp_ecdh() sets ECDH parameters to be used to be B<ecdh>.
The key is inherited by all B<ssl> objects created from B<ctx>.
+This macro is deprecated in favor of L<SSL_CTX_set1_groups(3)>.
SSL_set_tmp_ecdh() sets the parameters only for B<ssl>.
+This macro is deprecated in favor of L<SSL_set1_groups(3)>.
SSL_CTX_set_ecdh_auto() and SSL_set_ecdh_auto() are deprecated and
have no effect.