UPS XML: Support Thread

[lat9]

I've just submitted v1.7.10 of the UPSXML shipping method for the Zen Cart moderators' review and will post back here when it's available for download.

This release corrects a PHP 8.0+ Fatal error; XMLParse class now included in PHP base; see GitHub issue #27.

Now available for download: https://www.zen-cart.com/downloads.php?do=file&id=126