Description:
------------
setlocale( LC_ALL, 'Czech' ) does not work in my ISP's environment; one has to use lowercase 'czech' instead. The ISO639 (mentioned in setolcale() docs) lists country names with capitalized first letters, ie. setlocale() should accept 'Czech' or not to mention ISO639 at all.

'Czech' locale is OK under XAMPP used for local debugging.

I can't imagine why such functions should use case-sensitive string params.


Reproduce code:
---------------
//---
//From manual page: function.setlocale
//---
function e( $s ) {
  eval( '$r = '.$s.';' );
  echo $s, ' returns ', $r ? 'true (\''.$r.'\')' : 'false', "\n";
}
e( "setlocale( LC_ALL, 'Czech' )" );
e( "setlocale( LC_ALL, 'czech' )" );


Expected result:
----------------
setlocale( LC_ALL, 'Czech' ) returns true ('Czech')
setlocale( LC_ALL, 'czech' ) returns true ('czech')


Actual result:
--------------
setlocale( LC_ALL, 'Czech' ) returns false
setlocale( LC_ALL, 'czech' ) returns true ('czech')