curzone reality check and teardown changes to use the RIGHT zone

@@ -4105,11 +4105,13 @@
 void
 rfs4_clean_state_exi(struct exportinfo *exi)
 {
         nfs4_srv_t *nsrv4;
 
-        nsrv4 = zone_getspecific(rfs4_zone_key, curzone);
+        /* 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;