FFL-545: translating to multiple addresses corrected, cf.
r47021In
r47021, translate_ip(6)_net was changed to return multiple addresses if
necessary. However, the adaptation of the firewall code was buggy in that
calling normalize_network() threw all but the first address away. This changeset
introduces a new function normalize_networks() which is able to normalize a list
of subnet addresses at once.
Moreover, normalize_network() was redundantly defined in networking.inc as well
as in networking.inc.ipv4. As the function is
layer-3 agnostic (due to calling
netcalc which handles all supported
layer-3 protocols), the second instance has
been removed from networking.inc.ipv4.
