Fuzzer improvements.

phase_of_moon and friday_13th determined using rn2() instead of local
time if fuzzing.  Don't reseed using init_random() if fuzzing.  Allow
set_random to be called outside of hacklib.  rn2_on_display_rng uses
rn2 if fuzzing so that we have a single source of random that we can
ensure is reproducible.  Implement rul() that returns a random unsigned
long.  Fix bug in fuzzer handling of ntposkey which would cause us to use
unitialized values for x and y.  Added command line arguments to allow
auto starting and stopping of fuzzer.  Add a logging facility for the
fuzzer to use to record activity.  Added some scripts used to automate
fuzzer testing on windows.

sys/winnt/nttty.c

@@ -475,8 +475,14 @@ int *x, *y, *mod;
     coord cc;
     DWORD count;
     really_move_cursor();
-    if (iflags.debug_fuzzer)
-        return randomkey();
+    if (iflags.debug_fuzzer) {
+        int poskey = randomkey();
+        if (poskey == 0) {
+            *x = rn2(console.width);
+            *y = rn2(console.height);
+        }
+        return poskey;
+    }
     ch = (program_state.done_hup)
              ? '\033'
              : keyboard_handler.pCheckInput(

sys/winnt/windmain.c

@@ -336,7 +336,7 @@ attempt_restore:
             resuming = TRUE; /* not starting new game */
             if (discover)
                 You("are in non-scoring discovery mode.");
-            if (discover || wizard) {
+            if ((discover || wizard) && !iflags.fuzzer_auto_start) {
                 if (yn("Do you want to keep the save file?") == 'n')
                     (void) delete_savefile();
                 else {
@@ -461,6 +461,23 @@ char *argv[];
         case 'X':
             discover = TRUE, wizard = FALSE;
             break;
+        case 'F':
+            {
+                iflags.fuzzer_auto_start = 1;
+
+                if (argc > 1 && argv[1][0] != '-') {
+                    argc--;
+                    argv++;
+                    iflags.fuzzer_stop_and_save = atoi(*argv);
+
+                    if (argc > 1 && argv[1][0] != '-') {
+                        argc--;
+                        argv++;
+                        iflags.verbose_logging_start = atoi(*argv);
+                    }
+                }
+            }
+            break;
 #ifdef NEWS
         case 'n':
             iflags.news = FALSE;