IPVS: Remove incorrect ip_route_me_harder(), fix IPv6

Remove an incorrect ip_route_me_harder() that was probably a result of
merging my IPv6 patches with the local client patches. With this, IPv6+NAT
are working again.

Signed-off-by: Julius Volz <juliusv@google.com>
Signed-off-by: Simon Horman <horms@verge.net.au>