irc discussions tracked this down - the backports package has lxc-halt from debian, rather than (as it is supposed to have) symlink to lxc-shutdown.
Markign confirmed. Until this is fix released, please use lxc-shutdown instead.
irc discussions tracked this down - the backports package has lxc-halt from debian, rather than (as it is supposed to have) symlink to lxc-shutdown.
Markign confirmed. Until this is fix released, please use lxc-shutdown instead.