* On Windows, you need to supply -DMAKE_STATIC in CFLAGS when building the
   static library. This does not apply when using cmake.

 * When passing a knote pointer to the kernel, the reference count of
   the knote structure should be incremented. Conversely, when the pointer
   has been returned from the kernel and the event unregistered from the
   kernel, the reference count should be decremented.

 * Some functions should crash instead of silently printing a debug
   message.. for example, knote_release().

 * knote_get_by_ident uses 'short' for the ident, but the actual datatype
   is 'uintptr_t'.

 * need to uninitialize library after fork() using pthread_atfork()

 * Solaris unit test failure.
    
    LD_LIBRARY_PATH="..:/usr/sfw/lib/64" ./kqtest
    1: test_peer_close_detection()  
    2: test_kqueue()        
    3: test_kevent_socket_add()     
    4: test_kevent_socket_del()     
    5: test_kevent_socket_add_without_ev_add()      
    6: test_kevent_socket_get()     

    [read.c:84]: Unexpected event:_test_no_kevents(): [ident=7, filter=-1, flags = 1 (EV_ADD), fflags = 0, data=0, udata=fffffd7fff08c6b4]: Error 0


 * There are a number of stub functions that silently fail or succeed.
   These need to be cleaned up; at a minimum, they should emit very loud
   debugging output saying "FIXME -- UNIMPLEMENTED".

      $ grep STUB src/*/*.c  
      src/linux/proc.c:    return (-1); /*STUB*/
      src/linux/proc.c:    return (0); /* STUB */
      src/linux/proc.c:    return (0); /* STUB */
      src/linux/proc.c:    return (0); /* STUB */
      src/linux/proc.c:    return (0); /* STUB */
      src/linux/proc.c:    return (0); /* STUB */
      src/linux/read.c:    return (-1); /* STUB */
      src/linux/timer.c:    return (0); /* STUB */
      src/linux/vnode.c:    return (-1); /* FIXME - STUB */
      src/linux/write.c:    return (-1); /* STUB */
      src/posix/timer.c:    return (-1); /* STUB */
      src/solaris/socket.c:    return (-1); /* STUB */
      src/solaris/timer.c:    return (-1); /* STUB */
      src/windows/read.c:    return (-1); /* STUB */
      src/windows/timer.c:    return (0); /* STUB */

 * kqueue() should defer thread cancellation until the end.

 * kevent() should defer thread cancellation and call pthread_testcancel() 
   before and after the call to kevent_wait(). This may require changing the 
   way that EINTR is handled, to make sure that the EINTR is propagated up 
   the call stack to kevent().