Restore a receive queue in cases of:

1)socketpair with closed second end;
2)peer-less socket, who is a peer for others.

We use here a hack, it is the connect() with AF_UNSPEC family,
which clears peer of restoring socket. See unix_dgram_connect()
for the details.

This also makes socket_close_data test working.

SOCK_STREAM is supported in TCP_ESTABLISHED case in the same
function.
Signed-off-by: Kirill Tkhai <ktkhai@virtuozzo.com>

v2: 1)Add a commentary near connect()
    2)Delete test/zdtm/live/static/socket_close_data.desc
v3: delete ui->ue->peer check
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>