curzone reality check and teardown changes to use the RIGHT zone

*** 4105,4115 ****
  void
  rfs4_clean_state_exi(struct exportinfo *exi)
  {
          nfs4_srv_t *nsrv4;
  
!         nsrv4 = zone_getspecific(rfs4_zone_key, curzone);
          mutex_enter(&nsrv4->state_lock);
  
          if (nsrv4->nfs4_server_state == NULL) {
                  mutex_exit(&nsrv4->state_lock);
                  return;
--- 4105,4117 ----
  void
  rfs4_clean_state_exi(struct exportinfo *exi)
  {
          nfs4_srv_t *nsrv4;
  
!         /* curzone mightn't be exi_zone, so use exi_zone instead. */
!         ASSERT(exi->exi_zone == curzone || curzone == global_zone);
!         nsrv4 = zone_getspecific(rfs4_zone_key, exi->exi_zone);
          mutex_enter(&nsrv4->state_lock);
  
          if (nsrv4->nfs4_server_state == NULL) {
                  mutex_exit(&nsrv4->state_lock);
                  return;