o Added `() method in Thread, and inherit thread_id, it's thus possible to write a program like this:
void foo()
{
  werror("thread\n");
  sleep(2);
}

void main(int argc, array argv)
{
  Thread t = Thread( foo );
  t->wait();
}


Also, added _sprintf() methods to most of the classes (Queue et.al.)

Rev: lib/modules/Thread.pmod:1.25