Updated Upstream (Paper)

Upstream has released updates that appear to apply and compile correctly

Paper Changes:
PaperMC/Paper@9f1fa0b Fix item gravity on inactive items, remove dumb active skipping
PaperMC/Paper@1a1d0cf Use target pitch in teleport (generally the same thing)
PaperMC/Paper@8ba3073 fix "is_freezing" damage type tag
PaperMC/Paper@1523212 don't resend effects when PlayerItemConsumeEvent is cancelled
PaperMC/Paper@1330880 Add Friction API to minecarts
PaperMC/Paper@580a610 Allow using old ender pearl behavior & apply ender pearl exploit patch (#11524)
PaperMC/Paper@40a960d Rebuild patches
PaperMC/Paper@dfedf79 Correctly cancel consumption of consumable
PaperMC/Paper@147b796 get previous redstone level from the right state for experimental wires
PaperMC/Paper@ad9c58e Only expose velocity relative tp flags to API (#11532)
PaperMC/Paper@f273e6e Set updatingMinecraft to false
PaperMC/Paper@c5c1250 [ci skip] Remove leftover todo file (#11540)
PaperMC/Paper@7ee4835 Correctly clear  explosion density cache(#11541)
PaperMC/Paper@52a0590 Updated Upstream (Bukkit/CraftBukkit) (#11543)
PaperMC/Paper@5c0930d Fix fix recipe iterator patch
PaperMC/Paper@1de0130 re-add a dispense fix patch
PaperMC/Paper@16d7d73 bunch more general fixes
PaperMC/Paper@a5d7426 Correctly support RecipeChoice.empty (#11550)
PaperMC/Paper@85c870e Correct update cursor (#11554)
PaperMC/Paper@d19be64 Fix NPE with spark when CraftServer is not init yet (#11558)
PaperMC/Paper@92131ad Decrease dead entity teleport warning (#11559)

patches/server/0053-Add-canSaveToDisk-to-Entity.patch

@@ -0,0 +1,86 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: William Blake Galbreath <Blake.Galbreath@GMail.com>
+Date: Tue, 18 Feb 2020 20:07:08 -0600
+Subject: [PATCH] Add canSaveToDisk to Entity
+
+
+diff --git a/src/main/java/net/minecraft/world/entity/Entity.java b/src/main/java/net/minecraft/world/entity/Entity.java
+index 907d4661f123ae04c06c9fff8ebdf0b528ed21ba..863780d37c804fc7a085f540af2b70491c570877 100644
+--- a/src/main/java/net/minecraft/world/entity/Entity.java
++++ b/src/main/java/net/minecraft/world/entity/Entity.java
+@@ -611,6 +611,11 @@ public abstract class Entity implements SyncedDataHolder, Nameable, EntityAccess
+         }
+     }
+     // Paper end - optimise entity tracker
++    // Purpur start
++    public boolean canSaveToDisk() {
++        return true;
++    }
++    // Purpur end
+ 
+     public Entity(EntityType<?> type, Level world) {
+         this.id = Entity.ENTITY_COUNTER.incrementAndGet();
+diff --git a/src/main/java/net/minecraft/world/entity/projectile/WitherSkull.java b/src/main/java/net/minecraft/world/entity/projectile/WitherSkull.java
+index a1f25efb38eff32aaabe892ddbc9a60426923686..e0f25b057b7b908a10038d9e9695a500aa883c75 100644
+--- a/src/main/java/net/minecraft/world/entity/projectile/WitherSkull.java
++++ b/src/main/java/net/minecraft/world/entity/projectile/WitherSkull.java
+@@ -121,6 +121,11 @@ public class WitherSkull extends AbstractHurtingProjectile {
+         // do not hit rider
+         return target != this.getRider() && super.canHitEntity(target);
+     }
++
++    @Override
++    public boolean canSaveToDisk() {
++        return false;
++    }
+     // Purpur end
+ 
+     @Override
+diff --git a/src/main/java/net/minecraft/world/level/chunk/storage/EntityStorage.java b/src/main/java/net/minecraft/world/level/chunk/storage/EntityStorage.java
+index 356d010506fd21f3c752e4aa86c46c1106fdde3b..86e16dd6b905af31795fda8002f2e1f857ddcb9f 100644
+--- a/src/main/java/net/minecraft/world/level/chunk/storage/EntityStorage.java
++++ b/src/main/java/net/minecraft/world/level/chunk/storage/EntityStorage.java
+@@ -106,6 +106,7 @@ public class EntityStorage implements EntityPersistentStorage<Entity> {
+                 }
+                 // Paper end - Entity load/save limit per chunk
+                 CompoundTag compoundTagx = new CompoundTag();
++                if (!entity.canSaveToDisk()) return; // Purpur
+                 if (entity.save(compoundTagx)) {
+                     listTag.add(compoundTagx);
+                 }
+diff --git a/src/main/java/org/purpurmc/purpur/entity/DolphinSpit.java b/src/main/java/org/purpurmc/purpur/entity/DolphinSpit.java
+index 89c476c740b4efb4f44c1dcd384b908626d96780..f25abee6dbf99c8d08f8e09db02b41df86115faa 100644
+--- a/src/main/java/org/purpurmc/purpur/entity/DolphinSpit.java
++++ b/src/main/java/org/purpurmc/purpur/entity/DolphinSpit.java
+@@ -36,6 +36,13 @@ public class DolphinSpit extends LlamaSpit {
+                 dolphin.getZ() + (double) (dolphin.getBbWidth() + 1.0F) * 0.5D * (double) Mth.cos(dolphin.yBodyRot * 0.017453292F));
+     }
+ 
++    // Purpur start
++    @Override
++    public boolean canSaveToDisk() {
++        return false;
++    }
++    // Purpur end
++
+     public void tick() {
+         super_tick();
+ 
+diff --git a/src/main/java/org/purpurmc/purpur/entity/PhantomFlames.java b/src/main/java/org/purpurmc/purpur/entity/PhantomFlames.java
+index d7f5686fe897f3c2424b146c8e7d2862223d1eaf..58957b0bd3cd2c37fd4a6766a02e2506d9f51010 100644
+--- a/src/main/java/org/purpurmc/purpur/entity/PhantomFlames.java
++++ b/src/main/java/org/purpurmc/purpur/entity/PhantomFlames.java
+@@ -38,6 +38,13 @@ public class PhantomFlames extends LlamaSpit {
+                 phantom.getZ() + (double) (phantom.getBbWidth() + 1.0F) * 0.5D * (double) Mth.cos(phantom.yBodyRot * 0.017453292F));
+     }
+ 
++    // Purpur start
++    @Override
++    public boolean canSaveToDisk() {
++        return false;
++    }
++    // Purpur end
++
+     public void tick() {
+         super_tick();
+