Captcha plugin compatibility

So the fix with this one was in ldap_auth.php. Original line 53–

add_action('authenticate', 'wpmuLdapUsernamePasswordAuthenticate', 25, 3);

First of all, authenticate is supposed to be for filters, not actions. So the function was changed to add_filter. Second change was to change the priority to 15. Captcha uses 21 and looks like wordpress uses 30. Updated line:

add_filter('authenticate', 'wpmuLdapUsernamePasswordAuthenticate', 15, 3);