Minor change to how Melee Attack AI to fix zombie damage not hitting above 1 heart

Notes:

- Not fully tested and may interfere with animal attack AI, in fact the boss modifier may make animals lethal too. Use with caution!

Attempted to fix sources of cascading chunk loading due to path finding into unloaded chunks

Attempted to further reduce performance impact of long distance path finding

Fixed mobs wandering way off target and sometimes forgetting entirely

Fixed line of sight checks beyond 128 blocks raycasting into unloaded chunks

Fixed minor console error annoyance due to ridden entities

Moderate performance changes

Minor code cleanup

Note: This still needs more reworking to be performance friendly with high levels of mobs. Adjust your settings accordingly.

Finally bothered to update this to 1.12.2

Xray is now a configurable distance