tcp连接断开时未关闭fd

[KeshawnZhen]

tcp_connection.c中在处理tcp连接关闭时，未关闭fd

int handle_connection_closed(struct tcp_connection *tcpConnection) {
    struct event_loop *eventLoop = tcpConnection->eventLoop;
    struct channel *channel = tcpConnection->channel;
    event_loop_remove_channel_event(eventLoop, channel->fd, channel);
    if (tcpConnection->connectionClosedCallBack != NULL) {
        tcpConnection->connectionClosedCallBack(tcpConnection);
    }
}