-netlink.c: initial implementation done, needs basic router functionality
-adding. Can wait. Also support tun device.
+conffile.c: done
+
+dh.c: change format to binary from decimal string (without introducing
+endianness problems)
+
+netlink.c: done. jdamery reports tun-old code works on Linux-2.2
+Unresolved problem with ioctl(TUNSETIFF) sometimes return EINVAL.