doc: s/lxc.net.ipv6/lxc.net.ipv6.address/g
doc: s/lxc.net.ipv6/lxc.net.ipv6.address/g

Signed-off-by: Long Wang <aff024fe4ab0fece4091de044c58c9ae4233383a@laoqinren.net>

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