···185185CONFIG_PROT_TCP_SACK=y. This will improve the download speed. Selective
186186Acknowledgments are enabled by default with lwIP.
187187188188-.. note::
189189-190190- U-Boot currently has no way to verify certificates for HTTPS.
191191- A place to store the root CA certificates is needed, and then MBed TLS would
192192- need to walk the entire chain. Therefore, man-in-the middle attacks are
193193- possible and HTTPS should not be relied upon for payload authentication.
194194-195188Return value
196189------------
197190