Removed the Fl::set_awake_cb API and documented the Fl::awake(function, data) API.

git-svn-id: file:///fltk/svn/fltk/branches/branch-1.1@5749 ea41ed52-d2ee-0310-a9c1-e6b18d33e121

test/threads.cxx

@@ -111,12 +111,6 @@ void* prime_func(void* p)
   return 0;
 }
 
-void message_cb(void *m) {
-  if (m == (void *)browser1) putchar('1');
-  else putchar('2');
-  fflush(stdout);
-}
-
 int main(int argc, char **argv)
 {
   Fl_Window* w = new Fl_Window(200, 200, "Single Thread");
@@ -141,11 +135,6 @@ int main(int argc, char **argv)
   // when it is safe to do so...
   Fl::lock();
 
-  // Register a callback for Fl::awake() messages.  This allows
-  // you to get all thread messages even if you are in another
-  // run loop (say, with a modal dialog...)
-  Fl::set_awake_cb(message_cb);
-
   // Start threads...
 
   // One thread displaying in one browser