A very few webhosts use /admin as a special URL for you to access a
    control panel or something.  Unfortunately this conflicts with the
    standard location for the Moodle admin pages.  You can fix this by
    renaming the admin directory in your installation, and putting that
    new name here.  For example: <br /> <br /><b>moodleadmin</b><br /> <br />
    This will fix admin links in Moodle.