Reset ownership before executing the socket move.

Change-Id: I98532e59ef9c78a6cc1eb25a5a8535c4e2d9b15d

net/Socket.cpp

@@ -128,7 +128,11 @@ void SocketDisposition::execute()
     // We should have hard ownership of this socket.
     assert(_socket->getThreadOwner() == std::this_thread::get_id());
     if (_socketMove)
+    {
+        // Drop pretentions of ownership before _socketMove.
+        _socket->setThreadOwner(std::thread::id(0));
         _socketMove(_socket);
+    }
     _socketMove = nullptr;
 }
 

wsd/LOOLWSD.cpp

@@ -1485,7 +1485,6 @@ private:
             // until we attach the childProcess (with this socket)
             // to a docBroker, which will do the polling.
             disposition.setMove([child](const std::shared_ptr<Socket> &){
-                    // Drop pretentions of ownership before adding to the list.
                     addNewChild(child);
                 });
         }