Toggleable player crits, helps mitigate hacked clients. (#1040)

This is a port of https://github.com/PaperMC/Paper/blob/ver/1.8.8/Spigot-Server-Patches/0040-Toggleable-player-crits-helps-mitigate-hacked-client.patch
Also adds me to the MIT list.

Spigot-API-Patches/0041-Add-source-to-PlayerExpChangeEvent.patch

@@ -1,14 +1,14 @@
-From de084b3fedb588ce21b0ea7c3e08965804bb7971 Mon Sep 17 00:00:00 2001
+From 902e1a01df0798407c4cae98a52b05e83bffd1a7 Mon Sep 17 00:00:00 2001
 From: AlphaBlend <whizkid3000@hotmail.com>
 Date: Thu, 8 Sep 2016 08:47:08 -0700
 Subject: [PATCH] Add source to PlayerExpChangeEvent
 
 
 diff --git a/src/main/java/org/bukkit/event/player/PlayerExpChangeEvent.java b/src/main/java/org/bukkit/event/player/PlayerExpChangeEvent.java
-index f37491d7..30882559 100644
+index f37491d..3088255 100644
 --- a/src/main/java/org/bukkit/event/player/PlayerExpChangeEvent.java
 +++ b/src/main/java/org/bukkit/event/player/PlayerExpChangeEvent.java
-@@ -1,20 +1,42 @@
+@@ -1,21 +1,43 @@
  package org.bukkit.event.player;
  
 +import org.bukkit.entity.Entity; // Paper
@@ -37,7 +37,7 @@ index f37491d7..30882559 100644
           exp = expAmount;
      }
  
-+    /**
+     /**
 +     * Get the source that provided the experience.
 +     *
 +     * @return The source of the experience
@@ -48,9 +48,10 @@ index f37491d7..30882559 100644
 +    }
 +    // Paper end
 +
-     /**
++    /**
       * Get the amount of experience the player will receive
       *
+      * @return The amount of experience
 -- 
-2.14.1
+2.7.4