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371ebcbb9e
Before this patch, cloned expressions are released via ->destroy. This is a problem for the new connlimit expression since the ->destroy path drop a reference on the conntrack modules and it unregisters hooks. The new ->destroy_clone provides context that this expression is being released from the packet path, so it is mirroring ->clone(), where neither module reference is dropped nor hooks need to be unregistered - because this done from the control plane path from the ->init() path. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>