[XFA] Thread Management Automation 1.1.1a

There was an issue with the new install code.
For those that made an from an older version towards 1.1.1, don't install this version.

For those that already installed it freshly, uninstall and install this new 1.1.1 version.

Corrected bugs:

• When multiple actions are set on a thread, only the first one is executed.

New features:

• Automatic removal of threads older than X days (configurable per forum)
• Automatic removal of oldest threads when more than X threads are in the forum (configurable per forum)
• Possibility to schedule posts in threads to show at a specified date

Corrected Bug:

• SQL error after thread removal