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.

win/win32/scripts/fuzzer/clean.bat

@@ -0,0 +1,8 @@
+set BIN_DIR=..\..\..\..\bin\Debug\Win32
+
+set FUZZER_LOG=%BIN_DIR%\fuzzer.log
+set FUZZER_DIR=%BIN_DIR%\fuzzer
+
+if exist %BIN_DIR%\%USERNAME%* del %BIN_DIR%\%USERNAME%*
+if exist %FUZZER_LOG% del %FUZZER_LOG%
+

win/win32/scripts/fuzzer/longtest.bat

@@ -0,0 +1,23 @@
+echo off
+
+SETLOCAL ENABLEEXTENSIONS
+SETLOCAL ENABLEDELAYEDEXPANSION
+
+set STEP_SIZE=5000
+set FINAL_MOVE=500000
+set START_MOVE=5000
+
+for /L %%i in (%START_MOVE%, %STEP_SIZE%, %FINAL_MOVE%) do (
+
+    call runtill.bat %%i
+	
+	if ERRORLEVEL 1 (
+	    echo FAILED getting running to %%i.
+		exit /b 1
+	)
+
+)
+
+echo SUCCESS.
+
+

win/win32/scripts/fuzzer/restore.bat

@@ -0,0 +1,7 @@
+call clean.bat
+
+set BIN_DIR=..\..\..\..\bin\Debug\Win32
+set SAVED_GAME=%USERNAME%-wizard.NetHack-saved-game
+set FUZZER_DIR=%BIN_DIR%\fuzzer
+
+copy %FUZZER_DIR%\%SAVED_GAME% %BIN_DIR%\%SAVED_GAME%

win/win32/scripts/fuzzer/runtill.bat

@@ -0,0 +1,73 @@
+REM
+REM runtill target_move
+REM 
+echo off
+
+SETLOCAL ENABLEEXTENSIONS
+SETLOCAL ENABLEDELAYEDEXPANSION
+
+set TARGET_MOVE=%1
+
+if %TARGET_MOVE% == "" (
+  echo Usage:runtill target_move
+  goto :eof
+)
+
+set BIN_DIR=..\..\..\..\bin\Debug\Win32
+set SAVED_GAME=%USERNAME%-wizard.NetHack-saved-game
+set LOG_FILE=%BIN_DIR%\runtil.log
+set FUZZER_LOG=%BIN_DIR%\fuzzer.log
+set FUZZER_DIR=%BIN_DIR%\fuzzer
+set BASELINE=%FUZZER_DIR%\fuzzer.log
+
+if not exist %FUZZER_DIR% mkdir %FUZZER_DIR%
+
+call clean.bat
+
+if not exist %FUZZER_DIR%\%SAVED_GAME% (
+	%BIN_DIR%\nethack -D -F 0
+
+	copy %BIN_DIR%\%SAVED_GAME% %FUZZER_DIR%
+)
+
+call restore.bat
+
+%BIN_DIR%\nethack -D -F %TARGET_MOVE%
+
+move %BIN_DIR%\*.snap %BIN_DIR%\snapshots
+copy %FUZZER_LOG% %BASELINE%
+
+for /f "tokens=2,3 delims=: usebackq" %%i in (`findstr /c:START %BASELINE%`) do (
+	set START_SEED=%%j
+	set START_MOVE=%%i
+)
+
+for /f "tokens=2,3 delims=: usebackq" %%i in (`findstr /c:STOP %BASELINE%`) do (
+	set STOP_SEED=%%j
+	set STOP_MOVE=%%i
+)
+
+if !STOP_MOVE! LSS %TARGET_MOVE% (
+	cls
+	echo FAILED: Failed to reach target move. !STOP_MOVE! is not GTE %TARGET_MOVE%.
+	exit /b 1
+)
+
+call restore.bat
+
+%BIN_DIR%\nethack -D -F %TARGET_MOVE%
+
+fc %FUZZER_LOG% %BASELINE%
+  
+if ERRORLEVEL 1 (
+	cls
+	echo FAILED: Unable to reproduce same timeline
+	exit /b 1
+)
+
+del /q %FUZZER_DIR%\%SAVED_GAME%
+
+copy %BIN_DIR%\%SAVED_GAME% %FUZZER_DIR%
+
+echo !START_MOVE! to !STOP_MOVE!.
+echo SUCCESS.