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/Chunk-save-queue-improvements.patch

@@ -26,7 +26,7 @@ Then finally, Sleeping will by default be removed, but due to known issues with
 But if sleeps are to remain enabled, we at least lower the sleep interval so it doesn't have as much negative impact.
 
 diff --git a/src/main/java/com/destroystokyo/paper/PaperConfig.java b/src/main/java/com/destroystokyo/paper/PaperConfig.java
-index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
+index 18cabc4f3..797f794de 100644
 --- a/src/main/java/com/destroystokyo/paper/PaperConfig.java
 +++ b/src/main/java/com/destroystokyo/paper/PaperConfig.java
 @@ -0,0 +0,0 @@ public class PaperConfig {
@@ -41,7 +41,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 +    }
  }
 diff --git a/src/main/java/net/minecraft/server/ChunkRegionLoader.java b/src/main/java/net/minecraft/server/ChunkRegionLoader.java
-index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
+index 79cb3953b..7f3e874ba 100644
 --- a/src/main/java/net/minecraft/server/ChunkRegionLoader.java
 +++ b/src/main/java/net/minecraft/server/ChunkRegionLoader.java
 @@ -0,0 +0,0 @@ import java.util.Map;
@@ -153,7 +153,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 +    // Paper end
  }
 diff --git a/src/main/java/net/minecraft/server/FileIOThread.java b/src/main/java/net/minecraft/server/FileIOThread.java
-index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
+index acfdd52dc..fdbaf5fbd 100644
 --- a/src/main/java/net/minecraft/server/FileIOThread.java
 +++ b/src/main/java/net/minecraft/server/FileIOThread.java
 @@ -0,0 +0,0 @@ public class FileIOThread implements Runnable {