Only exploit ipf state keeping for CFW logging.

*** 58,67 ****
--- 58,68 ----
  icmptoicmp6types
  icmptoicmp6unreach
  idletime_tab
  ip6exthdr
  ipf_cb_ops
+ ipf_cfwlog_enabled
  ipf_dev_info
  ipf_devfiles
  ipf_kstat_tmp
  ipf_minor
  ipf_ops