MDL-14055 auth sync constants, needed for sync cleanup - backporting from HEAD

lib/authlib.php

@@ -38,7 +38,10 @@ define('AUTH_CONFIRM_OK', 1);
 define('AUTH_CONFIRM_ALREADY', 2);
 define('AUTH_CONFIRM_ERROR', 3);
 
-
+# MDL-14055
+define('AUTH_REMOVEUSER_KEEP', 0);
+define('AUTH_REMOVEUSER_SUSPEND', 1);
+define('AUTH_REMOVEUSER_FULLDELETE', 2);
 
 /**
  * Abstract authentication plugin.
@@ -58,7 +61,9 @@ class auth_plugin_base {
      * The fields we can lock and update from/to external authentication backends
      *
      */
-    var $userfields = array("firstname", "lastname", "email", "phone1", "phone2", "institution", "department", "address", "city", "country", "description", "idnumber", "lang");
+    var $userfields = array("firstname", "lastname", "email", "phone1", "phone2", 
+            "institution", "department", "address", "city", "country", 
+            "description", "idnumber", "lang");
 
     /**