support alternate container path in lxc-shutdown

Signed-off-by: Harald Dunkel <harald.dunkel@aixigo.de>
Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com>
lxc-create: add missing -P option for running lxc-destroy

Signed-off-by: Harald Dunkel <harald.dunkel@aixigo.de>
Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com>
support alternate container path in lxc-netstat.in

Signed-off-by: Harald Dunkel <harald.dunkel@aixigo.de>
Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com>