Prevent infinite loops in user code.

Possibly doable with debug.sethook: https://forum.minetest.net/viewtopic.php?p=155943#p155943

mentioned in issue #78 (closed)

Milestone changed to beta-2

Milestone changed to wishlist

Something like !25 (closed) ?

Now that OS code runs in a separate thread this isn't as much of an issue.

closed