LXCDIR is only used in lxc_container_new, whereas LXCPATH is used throughout
the rest of lxc, and even in the same file as lxc_container_new (for example
create_container_dir()).
Signed-off-by: Dwight Engen <dwight.engen@oracle.com>
Acked-by: Stéphane Graber <stgraber@ubuntu.com>