Update upstream B/CB/S

Adds /paper command for reloading the paper config.
Closes GH-639

Per-world config logging has been removed in favor of all or nothing
logging for all paper settings. I don't believe it was used enough to
warrant maintaining. If this is not the case it should be possible to
re-add it.

Spigot-Server-Patches/Configurable-top-of-nether-void-damage.patch

@@ -5,7 +5,7 @@ Subject: [PATCH] Configurable top of nether void damage
 
 
 diff --git a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
-index 06d15276..2767ffb7 100644
+index 62e6830aa..e524a464f 100644
 --- a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
 +++ b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
 @@ -0,0 +0,0 @@ public class PaperWorldConfig {
@@ -20,7 +20,7 @@ index 06d15276..2767ffb7 100644
 +    }
  }
 diff --git a/src/main/java/net/minecraft/server/Entity.java b/src/main/java/net/minecraft/server/Entity.java
-index 1e2e042b..e851e78a 100644
+index 313100aed..7feed2995 100644
 --- a/src/main/java/net/minecraft/server/Entity.java
 +++ b/src/main/java/net/minecraft/server/Entity.java
 @@ -0,0 +0,0 @@ public abstract class Entity implements ICommandListener {
@@ -67,7 +67,7 @@ index 1e2e042b..e851e78a 100644
          this.die();
      }
 diff --git a/src/main/java/net/minecraft/server/EntityMinecartAbstract.java b/src/main/java/net/minecraft/server/EntityMinecartAbstract.java
-index fd3337d3..ca1faa41 100644
+index fd3337d3f..ca1faa41d 100644
 --- a/src/main/java/net/minecraft/server/EntityMinecartAbstract.java
 +++ b/src/main/java/net/minecraft/server/EntityMinecartAbstract.java
 @@ -0,0 +0,0 @@ public abstract class EntityMinecartAbstract extends Entity implements INamableT