netfilter: connlimit: merge root4 and root6.
The root4 variable is used only when connlimit extension module has been stored by the iptables command. and the roo6 variable is used only when connlimit extension module has been stored by the ip6tables command. So the root4 and roo6 variable does not be used at the same time. Signed-off-by: NTaehee Yoo <ap420073@gmail.com> Signed-off-by: NPablo Neira Ayuso <pablo@netfilter.org>
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