- do not call any obd_fid_init() from llite, do that from lmv only;

- do not call any obd_fid_init() from llite, do that from lmv only;
- handle adding new mdc in lvm correctly from POV of seq init;
- move tgt disconnect to lmv_disconnect_mdc(), call obd_fid_fini() from it;
- deny adding new fld target on fly, continue to work with old targets set (hack until DHT is not used);
- fix sanity 24g, use mdd_is_root() for root comparisons as lu_fid_eq() can't be used fo root fids.