* remove all references to $ip6sitelocal and output a warning
message if the variable is defined.
* introduce $ip6uniquelocal (defaults to 'NO') that will control the
behaviour of the system when $ip6mode is ``router'' (i.e. fc00::/7
will not be routed if the variable is ``NO'') as per RFC 4193.
Thanks to Jonathan A. Kollasch for pointing this out in PR 32152.
immediately afterwards before bringing the interface up. This avoids
a small security gap existing in the previous scheme where IP Filter
was synced after all cloning interfaces were created and brought up.