=item const SSL_METHOD *B<TLS_client_method>(void);
Constructor for the I<version-flexible> SSL_METHOD structure for clients.
+Must be used to support the TLSv1.3 protocol.
=item const SSL_METHOD *B<TLS_server_method>(void);
Constructor for the I<version-flexible> SSL_METHOD structure for servers.
+Must be used to support the TLSv1.3 protocol.
=item const SSL_METHOD *B<TLSv1_2_method>(void);
=item int B<SSL_CTX_get_ex_new_index>(long argl, char *argp, int (*new_func);(void), int (*dup_func)(void), void (*free_func)(void))
+=item long B<SSL_CTX_get_extra_chain_certs>(SSL_CTX *ctx, STACK_OF(X509) **sk);
+
+=item long B<SSL_CTX_get_extra_chain_certs_only>(SSL_CTX *ctx, STACK_OF(X509) **sk);
+
=item void (*B<SSL_CTX_get_info_callback>(SSL_CTX *ctx))(SSL *ssl, int cb, int ret);
=item int B<SSL_CTX_get_quiet_shutdown>(const SSL_CTX *ctx);