more docs

html/checknewuser.php

@@ -1,6 +1,16 @@
 <?php
 /*! @file
 
+    @id $Id$
+
+    @see @ref apichecknewuser
+
+    @page api Server API
+
+    @tableofcontents
+
+    @section apichecknewuser Check If User Exists
+
     API-call checknewuser.php
 
     Check if a user exists in the server's user table.
@@ -9,8 +19,6 @@
     @return json encoded value:
       - 'user name as string', if user does exist
       - null, if user does not exist or in case of error
-
-    @id $Id$
 */
 //       1         2         3         4         5         6         7         8
 // 45678901234567890123456789012345678901234567890123456789012345678901234567890