* Escape both CR, LF and CR LF line breaks in Router.saveConfig()
      and unescape them in DataHelper.loadProps() to support
      saving and loading config properties with line breaks
    * Change the update URLs textbox into a textarea like keys have,
      so different URLs go on different lines
    * Modify TrustedUpdate to provide a method which supplies a key list
      delimited with CR LF line breaks
    * Modify DEFAULT_UPDATE_URL to supply a default URL list
      delimited with CR LF line breaks
    * Modify selectUpdateURL() to handle URL lists
      delimited by any kind of line breaks
    * Start saving trusted update keys
    * Improve formatting on configupdate.jsp