Patch 1.1a for mambo-phpShop 1.1

There's a new patch available to fix some bugs which where discussed on the forum at this site. Be sure to update!

The patch comes with this changelog:

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- shipping-address maintenance now completely works (from frontend and in admin)

- fixed the bug which was causing that products with adavanced attributes couldn't
be added to the cart, telling to select a special item.

- fixed a bug in the PayPal IPN integration (notify.php)

- fixed a bug, where the filename parameter of a downloadable product wasn't updated.

- enhanced the phpShop configuration, fixing the bug, when phpShop couldn't connect
to the smtp server. You can now configure:
- your mail/smtp server hostname
- whether to authenticate to the smtp server
- your smtp username / password