This patch was designed to be generic and thus usable for all kinds of
sockets. Not sure, thah this goal has been reached, but at least I tried.

Key ideas:
1) On-stack structure for collecting sockets queues and then passing them to
   parasite code.
2) Singly linked list is used for collecting structures, representing sockets
   of any kind (!) with queues.

Based on xemul@ patches.
Signed-off-by: Stanislav Kinsbursky <skinsbursky@openvz.org>
Acked-by: Pavel Emelyanov <xemul@parallels.com>
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>