1915 IPsec kstats shouldn't be persistent

@@ -162,12 +162,11 @@
 static boolean_t
 esp_kstat_init(ipsecesp_stack_t *espstack, netstackid_t stackid)
 {
         espstack->esp_ksp = kstat_create_netstack("ipsecesp", 0, "esp_stat",
             "net", KSTAT_TYPE_NAMED,
-            sizeof (esp_kstats_t) / sizeof (kstat_named_t),
-            KSTAT_FLAG_PERSISTENT, stackid);
+            sizeof (esp_kstats_t) / sizeof (kstat_named_t), 0, stackid);
 
         if (espstack->esp_ksp == NULL || espstack->esp_ksp->ks_data == NULL)
                 return (B_FALSE);
 
         espstack->esp_kstats = espstack->esp_ksp->ks_data;