* @param argc must be 6
* @param argv 0: binary name ("gnunet-helper-exit")
* 1: tunnel interface name ("gnunet-exit")
- * 2: IPv4 "physical" interface name ("eth0"), or "-" to not do IPv4 NAT
+ * 2: "physical" interface name ("eth0"), or "-" to not setup NAT
+ * and routing
* 3: IPv6 address ("::1"), or "-" to skip IPv6
* 4: IPv6 netmask length in bits ("64") [ignored if #4 is "-"]
* 5: IPv4 address ("1.2.3.4"), or "-" to skip IPv4