- access most globals by their $_XYZ['varname'] name

- fix some code errors and typos (missing $ in front of variable names and so on)
- fixed a lot of warnings that would have been thrown when error_reporting
  is set to show notices (if(isset($variable))) instead of if($variable) for
  example)

admin/editAppFamily.php

@@ -8,7 +8,7 @@ include(BASE."include/"."qclass.php");
 
 global $apidb_root;
 
-if(!loggedin() || (!havepriv("admin") && !$current->ownsApp($appId)) )
+if(!loggedin() || (!havepriv("admin") && !$_SESSION['current']->ownsApp($appId)) )
 {
     errorpage("Insufficient Privileges!");
     exit;