Installing Media Wiki on Debian

I followed these instructions http://meta.wikimedia.org/wiki/Running_MediaWiki_on_Debian_GNU/Linux

Which was pretty good. It forgot to mention that /etc/apach2/sites-avalible

    Alias /wiki/ "/var/lib/mediawiki1.5/"
    <Directory "/var/lib/mediawiki1.5/">
        Options Indexes MultiViews FollowSymLinks
        AllowOverride None
        Order deny,allow
        Deny from all
        Allow from 127.0.0.0/255.0.0.0 ::1/128
    </Directory>

Change the permissions for all mediawiki files

  sudo chown -R webapp:webapp /var/lib/mediawiki1.5/
  sudo chown -R webapp:webapp /usr/share/mediawiki1.5/
  sudo chown -R webapp:webapp /etc/mediawiki1.5/
  sudo -u webapp chmod 777 /var/lib/mediawiki1.5/upload/

Copy the same AdminSettings.php to the right place and edit

sudo -u webapp cp /usr/share/doc/mediawiki1.5/examples/AdminSettings.sample /etc/mediawiki1.5/AdminSettings.php

To dis-allow anyonomous edits add the following to LocalSettings.php

  #
  # Permission keys given to users in each group.
  # All users are implicitly in the '*' group including anonymous visitors;
  # logged-in users are all implicitly in the 'user' group. These will be
  # combined with the permissions of all groups that a given user is listed
  # in in the user_groups table.
  #
  # This replaces wgWhitelistAccount and wgWhitelistEdit
  #
  # The following line should be commented, otherwise these settings will
  # throw away the settings on DefaultSettings.php (you probably don't want this).
  # With this line commented you will only overwrite the settings you explicitly
  # define here (that's what you probably want).
  #$wgGroupPermissions = array();
  $wgGroupPermissions['*'    ]['createaccount']   = true;
  $wgGroupPermissions['*'    ]['read']            = true;
  $wgGroupPermissions['*'    ]['edit']            = false;

Next log in as WikiSysop and