Description:
------------
urldecoding seems to be done before arguemtns get split
for $_REQUEST etc.

Thus foo=test%026test becomes:
  foo=test
  test=
instead of
  foo=test&test

worked correctly in php 4.3.3.


Reproduce code:
---------------
<?
if (isset($_REQUEST['foo'])) {
  echo "<tt>'" . $_REQUEST['foo'] . "'</tt> -- ";
  print_r($_REQUEST);
}
?>

Expected result:
----------------
GET test.php?foo=test+test
Expected: 'test test' -- Array ( [foo] => test test )
-> As expected

GET test.php?foo=test+test%26test
Expected: 'test test&test' -- Array ( [foo] => test test&test )

Actual result:
--------------
GET test.php?foo=test+test
Result: 'test test' -- Array ( [foo] => test test )
-> As expected

GET test.php?foo=test+test%26test
Result: 'test test' -- Array ( [foo] => test test [test] => ) 
-> BUG.