Add CONFIG_NETFILTER_XT_MATCH_COMMENT to lxc-checkconfig
Add CONFIG_NETFILTER_XT_MATCH_COMMENT to lxc-checkconfig

Closes https://github.com/lxc/lxd/issues/3685

Signed-off-by: Stéphane Graber <089afc6d81f66f1168a9849e15660feae286e024@ubuntu.com>

federicobriata/lxc,caglar10ur/lxc,federicobriata/lxc,ss1h2a3tw/lxc,terceiro/lxc,terceiro/lxc,thmo/lxc,thmo/lxc,hallyn/lxc,terceiro/lxc,ss1h2a3tw/lxc,caglar10ur/lxc,thmo/lxc,hallyn/lxc,federicobriata/lxc,hallyn/lxc,caglar10ur/lxc,ss1h2a3tw/lxc