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(