Updated Upstream (Bukkit/CraftBukkit/Spigot) (#5299)

Upstream has released updates that appear to apply and compile correctly.
This update has not been tested by PaperMC and as with ANY update, please do your own testing

Bukkit Changes:
9d0ad318 Fix javadoc errors in previous commits
9501daa2 #578: Add methods to modify the rate of regeneration and starvation
197d8f3d #577: Add EntityExhaustionEvent

CraftBukkit Changes:
a021e334 #795: Add methods to modify the rate of regeneration and starvation
509e523c #792: Add EntityExhaustionEvent

Spigot Changes:
db99f821 Rebuild patches

Spigot-Server-Patches/EntityRegainHealthEvent-isFastRegen-API.patch

@@ -32,11 +32,11 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 --- a/src/main/java/net/minecraft/server/FoodMetaData.java
 +++ b/src/main/java/net/minecraft/server/FoodMetaData.java
 @@ -0,0 +0,0 @@ public class FoodMetaData {
-             if (this.foodTickTimer >= 10) {
+             if (this.foodTickTimer >= this.saturatedRegenRate) { // CraftBukkit
                  float f = Math.min(this.saturationLevel, 6.0F);
  
 -                entityhuman.heal(f / 6.0F, org.bukkit.event.entity.EntityRegainHealthEvent.RegainReason.SATIATED); // CraftBukkit - added RegainReason
 +                entityhuman.heal(f / 6.0F, org.bukkit.event.entity.EntityRegainHealthEvent.RegainReason.SATIATED, true); // CraftBukkit - added RegainReason // Paper - This is fast regen
-                 this.a(f);
+                 // this.a(f); CraftBukkit - EntityExhaustionEvent
+                 entityhuman.applyExhaustion(f, org.bukkit.event.entity.EntityExhaustionEvent.ExhaustionReason.REGEN); // CraftBukkit - EntityExhaustionEvent
                  this.foodTickTimer = 0;
-             }

Spigot-Server-Patches/Send-attack-SoundEffects-only-to-players-who-can-see.patch

@@ -48,7 +48,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
  
 @@ -0,0 +0,0 @@ public abstract class EntityHuman extends EntityLiving {
  
-                         this.applyExhaustion(world.spigotConfig.combatExhaustion); // Spigot - Change to use configurable value
+                         this.applyExhaustion(world.spigotConfig.combatExhaustion, EntityExhaustionEvent.ExhaustionReason.ATTACK); // CraftBukkit - EntityExhaustionEvent // Spigot - Change to use configurable value
                      } else {
 -                        this.world.playSound((EntityHuman) null, this.locX(), this.locY(), this.locZ(), SoundEffects.ENTITY_PLAYER_ATTACK_NODAMAGE, this.getSoundCategory(), 1.0F, 1.0F);
 +                        sendSoundEffect(this, this.locX(), this.locY(), this.locZ(), SoundEffects.ENTITY_PLAYER_ATTACK_NODAMAGE, this.getSoundCategory(), 1.0F, 1.0F); // Paper - send while respecting visibility
@@ -68,5 +68,5 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 +    }
 +    // Paper end
  
+     // CraftBukkit start
      public void applyExhaustion(float f) {
-         if (!this.abilities.isInvulnerable) {