win32: use Windows's own MKDIR and RMDIR

install.bat

@@ -80,7 +80,7 @@ local function exists(filename)
 end
 
 local function mkdir (dir)
-	return exec([[.\win32\tools\mkdir -p "]]..dir..[[" >NUL]])
+	return exec([[MKDIR "]]..dir..[[" >NUL]])
 end
 
 -- does the current user have admin privileges ( = elevated)

src/luarocks/core/cfg.lua

@@ -762,7 +762,7 @@ function cfg.init(detected, warning)
    local defaults = make_defaults(cfg.lua_version, processor, platforms, cfg.home)
 
    if platforms.windows and hardcoded.WIN_TOOLS then
-      local tools = { "SEVENZ", "CP", "FIND", "LS", "MD5SUM", "PWD", "RMDIR", "WGET", "MKDIR" }
+      local tools = { "SEVENZ", "CP", "FIND", "LS", "MD5SUM", "PWD", "WGET", }
       for _, tool in ipairs(tools) do
          defaults.variables[tool] = '"' .. hardcoded.WIN_TOOLS .. "/" .. defaults.variables[tool] .. '.exe"'
       end

win32/COPYING

@@ -4,8 +4,8 @@ following licenses:
 
 * For 7z.exe and 7z.dll, please see COPYING_7z for details.
 
-* find.exe, mv.exe, wget.exe, ls.exe, pwd.exe, rmdir.exe, md5sum.exe,
-  cp.exe, mkdir.exe, and uname.exe are part of UnxUtils, check
+* find.exe, mv.exe, wget.exe, ls.exe, pwd.exe, md5sum.exe,
+  cp.exe, and uname.exe are part of UnxUtils, check
   http://unxutils.sourceforge.net/ for license information.
 
 * Files under win32/lua5.1, except for Microsoft.VC80.CRT.manifest and msv*.*,