Description:
------------
There is no way to change the owner or group of a symlink.

Using chown and chgrp functions on a symlink affect the file 
referenced by the symbolic link, rather than the symbolic link 
itself.

There should have a "$dereference" argument to be able to affect the 
file referenced by the symlink or the symlink itself.

Reproduce code:
---------------
<?php
// Setup test files
if (file_exists('test-referent')) unlink('test-referent');
if (file_exists('test-symlink')||is_link('test-symlink')) unlink('test-symlink');
touch('test-referent');
symlink('test-referent', 'test-symlink');
echo shell_exec('chown -h nobody test-symlink test-referent 2>&1');

echo "Original owners: \n";
echo shell_exec("ls -l test-referent test-symlink") . "\n";

// Test changing symlink owner with PHP's chown() function

chown('test-symlink', 'root');

echo "New owners: \n";
echo shell_exec("ls -l test-referent test-symlink");
?>

Expected result:
----------------
chown should affect symlink owner instead of the referenced file

Original owners:
-rw-r--r-- 1 nobody root  0 2007-09-19 16:04 test-referent
lrwxrwxrwx 1 nobody root 13 2007-09-19 16:04 test-symlink -> 
test-referent

New owners:
-rw-r--r-- 1 nobody   root  0 2007-09-19 16:04 test-referent
lrwxrwxrwx 1 root root 13 2007-09-19 16:04 test-symlink -> 
test-referent

Actual result:
--------------
chown has affected the referenced file instead of the symlink itself

Original owners:
-rw-r--r-- 1 nobody root  0 2007-09-19 16:04 test-referent
lrwxrwxrwx 1 nobody root 13 2007-09-19 16:04 test-symlink -> 
test-referent

New owners:
-rw-r--r-- 1 root   root  0 2007-09-19 16:04 test-referent
lrwxrwxrwx 1 nobody root 13 2007-09-19 16:04 test-symlink -> 
test-referent