network: clear ifindeces
network: clear ifindeces

We need to clear any ifindeces we recorded so liblxc won't have cached stale
data which would cause it to fail on reboot we're we don't re-read the on-disk
config file.

Signed-off-by: Christian Brauner <48455ab3070520a2d174545c7239d6d0fabd9a83@ubuntu.com>

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