Spigot patch update: 0025 Watchdog Thread

https://github.com/EcoCityCraft/Spigot/blob/master/CraftBukkit-Patches/0025-Watchdog-Thread.patch
Revise debugging to help diagnose orebfuscator engine-mode 2 issue #728

This reverts commit 527bbd23ce0b9afe2ab5835f5fee43fbceb92bc4.