Description:
------------
When setting the base_priority parameter in win32_create_service it doesn't appear to have any visible effect on the service when it is run.  I'm trying to run the service in above normal priority, but when setting the base_priority to WIN32_ABOVE_NORMAL_PRIORITY_CLASS the service still runs at normal priority, as seen in the task manager.

Also, when setting the base_priority to WIN32_ABOVE_NORMAL_PRIORITY_CLASS I receive this notice:
Notice:  Use of undefined constant WIN32_ABOVE_NORMAL_PRIORITY_CLASS - assumed 'WIN32_ABOVE_NORMAL_PRIORITY_CLASS' in C:\test.php on line 41.

Changing WIN32_ABOVE_NORMAL_PRIORITY_CLASS to 32768 has no effect on the above bug report.

Reproduce code:
---------------
$status = win32_create_service( array(
'service'	=> 'testservice',
'display'	=> 'testservice',
'params'	=> '"C:\\test.php"',
'path'		=> 'C:\\php_net\\php.exe',
'base_priority'	=> 32768,
) ); 

Expected result:
----------------
I expect the service, when started, to show it as running in Above Normal priority when viewed through the task manager.

Actual result:
--------------
The service, when viewed through the task manager, is running in Normal priority.  Any processes I spawn from the test.php script also run under Normal priority.