Prevent unintended light block manipulation (#6601)

patches/server/0813-prevent-unintended-light-block-manipulation.patch

@@ -0,0 +1,18 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Jake Potrebic <jake.m.potrebic@gmail.com>
+Date: Mon, 13 Sep 2021 18:55:45 -0700
+Subject: [PATCH] prevent unintended light block manipulation
+
+
+diff --git a/src/main/java/net/minecraft/world/level/block/LightBlock.java b/src/main/java/net/minecraft/world/level/block/LightBlock.java
+index 7f4acaab7e77f5184c8f8a30ed13b34949780227..59faf48727cfbccacdd5ffa067758466a240e90a 100644
+--- a/src/main/java/net/minecraft/world/level/block/LightBlock.java
++++ b/src/main/java/net/minecraft/world/level/block/LightBlock.java
+@@ -46,6 +46,7 @@ public class LightBlock extends Block implements SimpleWaterloggedBlock {
+     @Override
+     public InteractionResult use(BlockState state, Level world, BlockPos pos, Player player, InteractionHand hand, BlockHitResult hit) {
+         if (!world.isClientSide) {
++            if (player.getItemInHand(hand).getItem() != Items.LIGHT || !player.mayInteract(world, pos) || !player.mayUseItemAt(pos, hit.getDirection(), player.getItemInHand(hand))) { return InteractionResult.FAIL; } // Paper
+             world.setBlock(pos, state.cycle(LEVEL), 2);
+             return InteractionResult.SUCCESS;
+         } else {