OS-3342 dlmgmtd needs to be mindful of lock ordering
OS-2608 dlmgmtd needs to record zone identifiers
OS-3492 zone_free asserts to its destruction when dlmgmtd has fallen
OS-3494 zoneadmd tears down networking too soon when boot fails
Reviewed by: Jerry Jelinek <jerry.jelinek@joyent.com>

@@ -459,10 +459,11 @@
         linkp->ll_class = class;
         linkp->ll_media = media;
         linkp->ll_linkid = dlmgmt_nextlinkid;
         linkp->ll_zoneid = zoneid;
         linkp->ll_gen = 0;
+        linkp->ll_tomb = B_FALSE;
 
         if (avl_find(&dlmgmt_name_avl, linkp, &name_where) != NULL ||
             avl_find(&dlmgmt_id_avl, linkp, &id_where) != NULL) {
                 err = EEXIST;
                 goto done;