have domain server remove dead agents from list

domain/src/main.cpp

@@ -67,7 +67,8 @@ int main(int argc, const char * argv[])
     
     sockaddr_in agentPublicAddress, agentLocalAddress;
     agentLocalAddress.sin_family = AF_INET;
-
+    
+    agentList.startSilentAgentRemovalThread();
     
     while (true) {
         if (agentList.getAgentSocket()->receive((sockaddr *)&agentPublicAddress, packetData, &receivedBytes)) {
@@ -83,6 +84,7 @@ int main(int argc, const char * argv[])
             }
         }
     }
+
     return 0;
 }
 

shared/src/AgentList.cpp

@@ -153,7 +153,8 @@ bool AgentList::addOrUpdateAgent(sockaddr *publicSocket, sockaddr *localSocket,
         
         return true;
     } else {
-        // we had this agent already
+        // we had this agent already, just update receive timestamp
+        agent->lastRecvTimeUsecs = usecTimestampNow();
         return false;
     }    
 }