IPVS: netns, misc init_net removal in core.

init_net removed in __ip_vs_addr_is_local_v6, and got net as param.

Signed-off-by: Hans Schillstrom <hans.schillstrom@ericsson.com>
Acked-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Simon Horman <horms@verge.net.au>