Just reading if event entry exist in buffer is not
enough we rathee need to be sure that all flags
and bits are recovered well.

For this sake we parse fdinfo before and after the
c/r sessions and compare results.
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>