Disable user registration when the CAS module is enabled.

git-svn-id: file:///tmp/wdn_thm_drupal/branches/drupal-7.x@92 20a16fea-79d4-4915-8869-1ea9d5ebf173

sites/all/modules/unl/unl_cas.module

 <?php
 
+function unl_cas_enable()
+{
+    variable_set('user_register', 0);
+}
+
 function unl_cas_init()
 {
     require_once dirname(__FILE__) . '/lib/CAS/CAS.php';