* Fix bug setting priority for IP addresses.
* Static IPv6 addresses from "ipv6.addresses" are now preferred over
 addresses from DHCPv6, which are preferred over addresses from autoconf.
 This affects IPv6 source address selection, if the rules from
 RFC 6724, section 5 don't give a exhaustive match.
* Static IPv6 addresses from "ipv6.addresses" are now interpreted with
 first address being preferred. Their order got inverted. This is now
 consistent with IPv4.