message: fix: found a bug in ghttp
  func_timer will kill teh whole child process and database needs to be loaded again
  by zengli, need to be fixed
diff: @@ -145,6 +145,8 @@ int main(int argc, char *argv[])
  srand(time(NULL));
  while (true) {
  + //NOTICE: here we use 2 processes, father process is used for monitor and control(like, restart)
  + //Child process is used to deal with web requests, can also has many threads
  pid_t fpid = fork();
  if (fpid == 0) {
  @@ -435,6 +437,8 @@ bool stop_thread(pthread_t _thread) {
  return pthread_kill(_thread, SIGTERM) == 0;
  }
  +//DEBUG+TODO: the whole process exits and need to reload the database
  +//(too slow: quit and restart)
  void* func_timer(void* _args) {
  signal(SIGTERM, thread_sigterm_handler);
  sleep(Util::gserver_query_timeout);
  