* Call to accept() was being made with an uninitialized variable for the

* Call to accept() was being made with an uninitialized variable for the
  third argument.  Changed the second and third argument to NULL and 0 because
  we don't really need accept() to fill up a buffer full of information that
  we'll never use.  (Thanks to SteveV for reporting the bug and helping to
  troubleshoot it.)
* Removed the mutex wrapper around select() because we don't need it.  All
  idle worker threads now block on select() and one of them will wake up when
  a connection arrives.