Update login box help file (Bug #892959)

Removed reference to IE7 and made some other
updates in regards to the login box itself.

Change-Id: I96cc0c6e0eba59be5f8a932107a5cdd81a177ea9
Signed-off-by: Kristina D.C. Hoeppner <kristina@catalyst.net.nz>

htdocs/lang/en.utf8/help/sections/loginbox.html

 <!-- @license http://www.gnu.org/copyleft/gpl.html GNU GPL version 3 or later -->
 <!-- @copyright For copyright information on Mahara, please see the README file distributed with this software. -->
 <h3>Login</h3>
-<p>Your login details will either be the username and password you entered during registration or others assigned by the site administrator.</p>
-<p>Click <a href="forgotpass.php">password reminder</a> to request a password reset at any time.</p>
+<p>Your login details will either be the username and password you entered during registration or others assigned to you by an administrator.</p>
+<p>In some cases, you may not be able to use this login box, but will have a different way of logging in, e.g. via Moodle or single sign-on. Your administrator will have told you where to log in if that is the case.</p>
+<p>Click "<a href="forgotpass.php">Lost username / password</a>" to request a password reset at any time.</p>
 <p>For your security, you will be logged out of the system automatically after a period of inactivity. You will be prompted to log in again.</p>
-<p><strong>Note:</strong> This site requires a current web browser such as Internet Explorer version 7.0 or higher or any recent version of Firefox, Safari, or Chrome. You must have cookies enabled.</p>
+<p><strong>Note:</strong> This site requires a recent version of Firefox, Chrome, Internet Explorer or Safari.</p>