-In order to force the kernel to accept received packets, the destination MAC
-address will be set to FE:FD:00:00:00:00 upon reception. The MAC address of the
-ethertap or tun/tap interface must also be set to this address. See the manual
-for more detailed information.
+In order to force the kernel to accept received packets, the
+destination MAC address will be set to FE:FD:00:00:00:00 upon
+reception. The MAC address of the ethertap or tun/tap interface must
+also be set to this address. See the manual for more detailed
+information.
+
+tincd regenerates its encryption key pairs. It does this on the first
+activity after the keys have expired. This period is adjustable in the
+configuration file, and the default time is 3600 seconds (one hour).
+
+This version supports multiple subnets at once. They are also sorted
+on subnet mask size. This means that it is possible to have
+overlapping subnets on the VPN, as long as their subnet mask sizes
+differ.
+
+Since pre5, tinc can operate in several routing modes. The default mode,
+"router", works exactly like the older version, and uses Subnet lines to
+determine the destination of packets. The other two modes, "switch" and "hub",
+allow the tinc daemons to work together like a single network switch or hub.
+This is useful for bridging networks.