todo docs
added note that you can only do fakeisp from Debian
added wide-dhcpv6-server for PD
moved to ULA addressing
unbound now listens on IPv6
router autoconf's on uplink to get at global routing
some faffing with fakeisp's makefile
PROBLEM: udhcpc6 uses a raw socket, and over PPP it seems that the source address is just '::'.  dhcp6s sees this but is unable to reply (sendmsg works, but traffic vanishes...)