Description:
------------
abstract static functions aren't allowed anymore, but if they can be inherited they IMHO should be allowed to be made abstract

Reproduce code:
---------------
<?php
abstract class foo
{
	abstract static public function bar();
}

class bar extends foo
{
	static public function bar()
	{
		
	}
}
?>

Actual result:
--------------
Fatal error: Static function foo::bar() cannot be abstract