* 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
4e68f2a157