Fredashay's Subway

1.17 and 1.18 broke a few things, especially since Y can go below zero. Fixed some bugs related to that.

Rewrote protection modules to greatly improve efficiency and reduce server lag. Be aware that the first time this upgrade runs, it will build a new database table index when the server starts and users won't be able to log onto the server until it completes. This will take a fair amount of time, especially if you have a large subway system. It will only run once the first time you start your server with this version of the plugin. If you are satisfied with your current version of this plugin, there is no need to upgrade. But if you do want to upgrade, you should install the new version and restart your server late at night when there are no users online.