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-cactus-and-reed-natural-growth-heights.patch

@@ -5,7 +5,7 @@ Subject: [PATCH] Configurable cactus and reed natural growth heights
 
 
 diff --git a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
-index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
+index f24839378..6228bc1f6 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 {
@@ -23,7 +23,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 +    }
  }
 diff --git a/src/main/java/net/minecraft/server/BlockCactus.java b/src/main/java/net/minecraft/server/BlockCactus.java
-index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
+index 3f579fbdb..a69a707aa 100644
 --- a/src/main/java/net/minecraft/server/BlockCactus.java
 +++ b/src/main/java/net/minecraft/server/BlockCactus.java
 @@ -0,0 +0,0 @@ public class BlockCactus extends Block {
@@ -36,7 +36,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
  
                  if (j >= (byte) range(3, ((100.0F / world.spigotConfig.cactusModifier) * 15) + 0.5F, 15)) { // Spigot
 diff --git a/src/main/java/net/minecraft/server/BlockReed.java b/src/main/java/net/minecraft/server/BlockReed.java
-index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
+index 84014b1c7..9d1af2adc 100644
 --- a/src/main/java/net/minecraft/server/BlockReed.java
 +++ b/src/main/java/net/minecraft/server/BlockReed.java
 @@ -0,0 +0,0 @@ public class BlockReed extends Block {