public function setup()
 {
     parent::setup();
     self::$errId = null;
     // assume 'sgExtraNamespaces' array doesn't exist
     $this->sgid = 0;
     // assume default.
     $r = $this->checkTable();
     if ($r == false) {
         return;
     }
     // setup 'supergroup' id based on looking up
     // user in the 'supergroups' database table
     global $wgUser;
     $this->sgid = $this->getSgId($wgUser);
     // namespace boundary checks
     // only allowed 256 namespaces per SuperGroup
     $r = $this->checkBoundaries();
     // if we got a 'null', then not much to do!
     // (i.e. there is no 'extra' namespaces asked for)
     if ($r === null) {
         return;
     }
     // if we got 'false', then an error with the
     // namespace ids was declared.
     if ($r == false) {
         self::$errId = true;
         return;
     }
     // if we got a 'true' response, then let's setup!
     $this->setupExtraNamespaceSet();
 }
* -- The normal namespaces set starts at 0  (well, technically
*    there are also the -1 and -2 namespaces)
* 
* LocalSettings.php:
* ==================
* require("extensions/ExtensionClass.php");
* require("extensions/SuperGroups/SuperGroups.php");
*
* CONFIGURATION EXAMPLE:
* ======================

	 $sgExtraNamespaces = array (
	 100 => array( 'name' => "Admin",     'id' => 'NS_ADMIN'),
	 102 => array( 'name' => "Blog",      'id' => 'NS_BLOG' ), 
	 103 => array( 'name' => "Blog_talk", 'id' => 'NS_BLOG_TALK' ),
	 104 => array( 'name' => "Contact",   'id' => 'NS_CONTACT' ),
	 106 => array( 'name' => "Test",      'id' => 'NS_TEST' ),
	 );

*
* HISTORY:	v1.0
*
*/
require dirname(__FILE__) . '/SuperGroupsClass.php';
// Verify if 'ExtensionClass' is present.
if (!class_exists('ExtensionClass')) {
    echo 'ExtensionClass missing: SuperGroups extension will not work!';
} else {
    SuperGroupsClass::singleton();
}
$wgExtensionCredits[SuperGroupsClass::thisType][] = array('name' => SuperGroupsClass::thisName, 'version' => 'v1.0 $Id$', 'author' => 'Jean-Lou Dupont', 'description' => 'Extension status: ');