-@strong{Beware}: by default packet serial numbers are still processed
-through the XTEA encryption. It is not required for confidentiality and
-security, but for randomizing some parts of the traffic to make it
-indistinguishable from the noise, for making it more DPI-proof. It
-safely can be disabled, turned off or maybe its keys even can be
-revealed without security and forward secrecy loss.
-