fix lock issue for QT node diconnect and RPC disconnectnode

src/qt/rpcconsole.cpp

@@ -687,7 +687,7 @@ void RPCConsole::disconnectSelectedNode()
     QString strNode = GUIUtil::getEntryData(ui->peerWidget, 0, PeerTableModel::Address);
     // Find the node, disconnect it and clear the selected node
     if (CNode *bannedNode = FindNode(strNode.toStdString())) {
-        bannedNode->CloseSocketDisconnect();
+        bannedNode->fDisconnect = true;
         clearSelectedNode();
     }
 }

src/rpcnet.cpp

@@ -231,7 +231,7 @@ UniValue disconnectnode(const UniValue& params, bool fHelp)
     if (pNode == NULL)
         throw JSONRPCError(RPC_CLIENT_NODE_NOT_CONNECTED, "Node not found in connected nodes");
 
-    pNode->CloseSocketDisconnect();
+    pNode->fDisconnect = true;
 
     return NullUniValue;
 }
@@ -519,7 +519,7 @@ UniValue setban(const UniValue& params, bool fHelp)
 
         //disconnect possible nodes
         while(CNode *bannedNode = (isSubnet ? FindNode(subNet) : FindNode(netAddr)))
-            bannedNode->CloseSocketDisconnect();
+            bannedNode->fDisconnect = true;
     }
     else if(strCommand == "remove")
     {