Adjust comment describing mbedtls_ssl_conf_sni()

Signed-off-by: Glenn Strauss <[email protected]>

include/mbedtls/ssl.h

@@ -3621,8 +3621,7 @@ void mbedtls_ssl_set_hs_authmode( mbedtls_ssl_context *ssl,
  * mbedtls_ssl_set_hs_ca_chain() as well as the client
  * authentication mode with \c mbedtls_ssl_set_hs_authmode(),
  * then must return 0. If no matching name is found, the
- * callback must either set a default cert, or
- * return non-zero to abort the handshake at this point.
+ * callback may return non-zero to abort the handshake.
  *
  * \param conf SSL configuration
  * \param f_sni verification function