This allows libnetfilter_queue to access connection tracking information
by requesting NFQA_CFG_F_CONNTRACK. Connection tracking information is
provided in the NFQA_CT attribute.
CONFIG_NETFILTER_NETLINK_GLUE_CT enables the interaction between
nf_queue and nf_conntrack_netlink. Without this option, trying to access
connection tracking information results in "Operation not supported".
Signed-off-by: Etan Kissling <etan_kissling@apple.com>