I'm guessing that Apache treats the symlink independently from the original path, so replace:
Code:
<Directory "/usr/share/doc/pam-0.77/html">
Order allow,deny
Deny from all
</Directory>
with:
Code:
<Directory "/var/www/html/pam">
Order allow,deny
Deny from all
</Directory>
Either that or you need to restart the http daemon.
HTH