TODO: expand on what we need to do to handle target-originated iscsi-nop.

TODO

@@ -4,6 +4,13 @@ Some features that should be added
   These are unsolicited nops sent from the targetr which we need to respond
   to. TGTD does not suppot these but IET should do so and could be used
   to test with.
+  This is a simple addition, but needs a target that uses iscsi-nop
+  for testing.
+  Since libiscsi will be a responder to these commands, we will
+  not receive a reply to these, as we do for almost all normal commands.
+  This is somewhat similar to how we do data-out pdus. 
+  See ISCSI_PDU_DELETE_WHEN_SENT and iscsi_send_data_out() for how
+  create and send PDUs to which we will not expect a response.
 
 * More efficient api for read/write commands where we read/write straight
   from the socket into the buffer the application specified instead of as now