This reverts commit 21d94e00.

This patch was created for investigating
https://bugzilla.openvz.org/show_bug.cgi?id=2676

The bug is fixed and this patch does nothing useful, because tcpdump
starts too late.
Signed-off-by: Andrey Vagin <avagin@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>