Fix panic on table/table entry delete. The panic could have happened

if more than 64 distinct values had been used.

Table value code uses internal objhash API which requires unique key
  for each object. For value code, pointer to the actual value data
  is used. The actual problem arises from the fact that 'actual' e.g.
  runtime data is stored in array and that array is auto-growing. There is
  special hook (update_tvalue() function) which is used to update the pointers
  after the change. For some reason, object 'key' was not updated.
  Fix this by adding update code to the update_tvalue().

Sponsored by:	Yandex LLC

sys/netpfil/ipfw/ip_fw_table_value.c

@@ -158,6 +158,7 @@ update_tvalue(struct namedobj_instance *ni, struct named_object *no, void *arg)
 
 	pval = da->pval;
 	ptv->pval = &pval[ptv->no.kidx];
+	ptv->no.name = (char *)&pval[ptv->no.kidx];
 
 }