Add link to Scripts FAQ 'who is a locker administrator?'

Author: achernya

signup.html

@@ -84,7 +84,8 @@ <h2>
       </p>
       <p>
 	You can also sign up group accounts (lockers) you have
-	administrator privileges on. If you're
+	<a href="http://scripts.mit.edu/faq/58/who-is-a-locker-administrator">
+	  administrator privileges</a> on. If you're
 	using <a href="http://scripts.mit.edu/">Scripts</a>
 	Autoinstallers, they'll automatically sign up for a
 	sql.mit.edu account if needed.