2     2 session00
    4     4  \_ session00		# {NEWSID, },
    2     5  \_ session00		# {0, },
    8     8  \_ session00
    2     9  |   \_ session00           # {CHANGESID, }
   10    10  \_ session00
   11    11      \_ session00
    2    12          \_ session00	# {DOUBLE_CHANGESID | CHANGESID, }
    2     3 session00			# {DETACH, },
    6     7 session00			# {DETACH|NEWSID, },
Signed-off-by: Andrey Vagin <avagin@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>