restore: Temporary comment out exit's on sid/pgid mismatch

Util we have kernel support.
[ xemul: MySQL uses runaway pgid and sid and we cannot restore it
  gracefully with exiting API :( Byt MySQL seem not to care about
  pgid and sid change after restore, so ignore this for a while ]

Signed-off-by: Pavel Emelyanov <xemul@parallels.com>