IE6update does not uninstall cleanly.

This module needs to implement hook_uninstal() to properly delete the variables it sets via the admin page. Otherwise, disabling and deleting the module leaves some cruft in the DB.

While we're adding a new install file, we may as well implement hook_insall().

Here are the contents of the install file as the attachment feature of the site disallows files with a ".install" extension:

ie6update.install

/**
 * @file
 * Handles ie6update installation and upgrade tasks.
 */
 
/**
 * Implementation of hook_install().
 */
function ie6update_install() {
  variable_set('ie6update_destination_url', 'http://www.microsoft.com/windows/internet-explorer/default.aspx');
  variable_set('ie6update_update_bar_message', 'Internet Explorer is missing updates required to view this site. Click here to update... '),
}

/**
 * Implementation of hook_uninstall().
 */
function ie6update_uninstall() {
  variable_del('ie6update_destination_url');
  variable_del('ie6update_update_bar_message');
}

(Obviously the closing "?>" need not be included.