Don't send acks to ignored senders.

src/class_receiveDataThread.py

@@ -1,4 +1,5 @@
 doTimingAttackMitigation = True
+sendAckEvenIfMsgIgnored = False
 
 import time
 import threading
@@ -1050,6 +1051,12 @@ class receiveDataThread(threading.Thread):
                         toAddress, '[Broadcast subscribers]', fromAddress, subject, message, ackdata)))
                     shared.workerQueue.put(('sendbroadcast', ''))
 
+                if self.isAckDataValid(ackData):
+                    print 'ackData is valid. Will process it.'
+                    self.ackDataThatWeHaveYetToSend.append(
+                        ackData)  # When we have processed all data, the processData function will pop the ackData out and process it as if it is a message received from our peer.
+            else: # BlockMsg is true
+                if sendAckEvenIfMsgIgnored:
                     if self.isAckDataValid(ackData):
                         print 'ackData is valid. Will process it.'
                         self.ackDataThatWeHaveYetToSend.append(