anchor.diff:  
   Other options:
   /CONFIG [dir]  Location where the config file should be installed.
  -               Default is same place of installation
  +               Default is %PROGRAMDATA%\LuaRocks
   /FORCECONFIG   Use a single config location. Do not use the
                  LUAROCKS_CONFIG variable or the user's home directory.
                  Useful to avoid conflicts when LuaRocks
  
positive.code: 
  -- check for combination/required flags
  local function check_flags()
  	if not P_SET then
  		die("Missing required parameter /P")
  	end
  	if INSTALL_LUA then
  		if vars.LUA_INCDIR or vars.LUA_BINDIR or vars.LUA_LIBDIR or vars.LUA_PREFIX then
  			die("Cannot combine option /L with any of /LUA /BIN /LIB /INC")
  
negative.code: 	print(S[[
  Installs LuaRocks.
  
  /P [dir]       Where to install LuaRocks. 
                 Note that version; $VERSION, will be appended to this
                 path, so "/P c:\luarocks\" will install in 
                 "c:\luarocks\$VERSION\"
                 Default is %PROGRAMFILES%\LuaRocks
  
  Configuring the destinations:
  /TREE [dir]    Root of the local tree of installed rocks.
                 Default is %PROGRAMDATA%\LuaRocks
  /SCRIPTS [dir] Where to install commandline scripts installed by
                 rocks. Default is {TREE}/bin.
  
  Configuring the Lua interpreter:
  /LV [version]  Lua version to use; either 5.1 or 5.2.
  