Update upstream B/CB/S

Closes GH-631

Spigot-Server-Patches/Disable-ticking-of-snow-blocks.patch

@@ -5,7 +5,7 @@ Subject: [PATCH] Disable ticking of snow blocks
 
 
 diff --git a/src/main/java/net/minecraft/server/BlockSnowBlock.java b/src/main/java/net/minecraft/server/BlockSnowBlock.java
-index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
+index 8123d729..b6765e5b 100644
 --- a/src/main/java/net/minecraft/server/BlockSnowBlock.java
 +++ b/src/main/java/net/minecraft/server/BlockSnowBlock.java
 @@ -0,0 +0,0 @@ public class BlockSnowBlock extends Block {
@@ -25,7 +25,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 +    /*
      public void b(World world, BlockPosition blockposition, IBlockData iblockdata, Random random) {
          if (world.getBrightness(EnumSkyBlock.BLOCK, blockposition) > 11) {
-             this.b(world, blockposition, world.getType(blockposition), 0);
+             // CraftBukkit start
 @@ -0,0 +0,0 @@ public class BlockSnowBlock extends Block {
          }