Correct typo in comment

web/systemdefaults.inc.php

@@ -1118,7 +1118,7 @@
 // Filtering by attribute
 // The next two settings allow you to use CAS attributes to require that a user must have certain
 // attributes, otherwise their access level will be zero.  In other words unless they ahave the required
-// attributes they will be able to login successfully, but then won't have any more rights than an
+// attributes they will be able to log in successfully, but then won't have any more rights than an
 // unlogged in user.
 // $auth['cas']['filter_attr_name'] = ''; // eg 'department'
 // $auth['cas']['filter_attr_values'] = ''; // eg 'DEPT01', or else an array, eg array('DEPT01', 'DEPT02');