Changeset 46864 for trunk/tests/phpunit/tests/date/xmlrpc.php

Date/Time: XML-RPC: Сalculate the proper offset for GMT in wp.newPost, wp.editComment, mw.newPost, mw.editPost when post_date or comment_date is set.

Previously, post_date or comment_date was assumed to be GMT, which is only true if the timezone string for the site matches GMT.

Add unit tests.

Props Rarst, smerriman, justdaiv, wonderboymusic, noyle.
Fixes #30429.