- the init() now calls for init_thread() to save blocked
   signals mask in per-thread data

 - the fini() now calls for fini_thread() to restore the
   blocked signals, note: we could use thread_leader directly
   but i think calling for fini_thread() is more generic

 - dump_misc() now uses per-thread data
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>