Functions that accept no arguments should be
explicitly declared a void parameter in their parameter list.
Signed-off-by: Marco Wang <m.aesophor@gmail.com>
We usually disable IPv6AcceptRA= if the test does not require any
dynamic address configuration, as it makes slightly slow down the test.
C.f. 491b79aeac.
Previously, address_establish() took Address object stored in Network
object. And address_release() took Address object stored in Link
object. Thus, address_release() always did nothing.
When the MAC address of a link is updated, an address on the link may
be under checking address duplication. Or, (currently such code is not
implemented yet, but) address duplication check may be restarted later.
For that case, the IPv4 ACD clients must use the new updated MAC address.
Previously, IPv4 DAD is configured in each Address object stored in
Network object. If a .network file matches multipe links, then it causes
an assertion. To prevent it, now IPv4 DAD is configured in each Address
object belogs to Link object.
