- #489180 Provide "remember me" checkbox on registration form (when users are able to login immediately).

- #456334 Problems when cookie domains are www.example.com and subdomain.example.com (drupal removes www.).
  Let's derive the PL cookie name from the Drupal session name. Also, please check out Drupal issue #458704

  hook_boot().

- Remove debug code (insecure).

- Add weight to security section in user profile view.
- Delete all module variables in hook_uninstall().
- Moved a few functions to external file that's loaded when needed.
- Minor coding-style issues here and there.

#278269 by sual11: Include includes/path.inc for drupal_goto()

- Erase the PL cookie on logout.
- Fix an E_ALL error with $edit['pass'].
- Bring debug code up to date.