restore_sk_common() may shutdown a socket, and queuer
won't be able to connect to it. So, this action must
be postponed.

We have this problem since long ago, but we are lucky
we haven't bumped in it.
Signed-off-by: Kirill Tkhai <ktkhai@virtuozzo.com>
Signed-off-by: Andrei Vagin <avagin@virtuozzo.com>