-* add a digital signature to each packet, using HMAC
-
-* enable encryption using other ciphers (IDEA)
- * the library is already included, but it cannot be used.
-
-* allow multiple outgoing links, or a list of them, so that if a host
- is not available, that we can select another from the list.
-
-* support for multiple protocols; PPTP, IPSec, NIAS, L2TP,...