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Add new sysctl flag "snat_reroute". Recent kernels use ip_route_me_harder() to route LVS-NAT responses properly by VIP when there are multiple paths to client. But setups that do not have alternative default routes can skip this routing lookup by using snat_reroute=0. Signed-off-by: Julian Anastasov <ja@ssi.bg> Signed-off-by: Patrick McHardy <kaber@trash.net>