[CRIU] [PATCH 6/9] pstree: Allow to dump and restore session non-leaders if --ext-tty passed

[Cyrill Gorcunov]

If --ext-tty passed we allow to dump and restpre session non-leaders.

This slightly changes the behaviour or the tool. If previously
we allowed to dump non-leaders after this commit we refuse to
do that if not explicitly requested.

Note that in sake of tty restore (which will be addressed in
further patches) we do inherit process group for root task.

Signed-off-by: Cyrill Gorcunov <gorcunov at openvz.org>
---
 cr-dump.c        |    2 +-
 include/pstree.h |    9 ++++++-
 pstree.c         |   66 +++++++++++++++++++++++++++++++++++++++++++++++++++--
 3 files changed, 72 insertions(+), 5 deletions(-)

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