This drush file adds to aegir apache config, when a site is protected by http basic authentication, it grants access to the site's files folder without a password.

http_passwords.drush.inc

<?php


/*
 * Implementation of hook_provision_apache_vhost_config()
 */
function http_passwords_provision_apache_vhost_config($uri, $data) {
  $lines = array();
  $user = d()->http_basic_auth_username;
  $pass = d()->http_basic_auth_password;

  if (!empty($user) && !empty($pass)) {
    $root = d()->root;
    $lines[] = "  <Directory \"$root/sites/$uri/files\">";
    $lines[] = "     Require all granted ";
    $lines[] = "  </Directory>";
    $lines[] = "";
  }

  return implode("\n", $lines);
}