Changed the linkTo function (from Helper class) to get rid of an unnecessary (and potentially non conform) leading '&' character when adding arguments

introduction of display names

only change display name if the display name from the current user was changed; add correct display name to new user

Add Default Robot Disallow

Permanently display shared status icons

This is needed for security reasons - often people looking to exploit applications will search for something in a certain version of a web application and find many sites to exploit. This stops that from being so easy.

Make update page with CSP compatible

change order, key -> uid and value -> display name, this way it is also possible to have non-unique display names

added parameter mail_smtpauthtype to set SMTP authentication type.

Conflicts:
	core/templates/update.php

Files: CSP fixes

Add create permission, fixes #780