Allow server startup for those poor people running <1G Xmx

Clamp logic for poolsize so we dont pass zero

Spigot-Server-Patches/0522-Optimize-NibbleArray-to-use-pooled-buffers.patch

@@ -81,7 +81,7 @@ index 034244c2465b9999c6fba63ab2310becef51b887..a964647d1464d33c69b860cce44d918a
  
          @Override
 diff --git a/src/main/java/net/minecraft/server/NibbleArray.java b/src/main/java/net/minecraft/server/NibbleArray.java
-index 996c8326387b5a7fe62db6a76e000144565cb85b..af32197dc82e3ebf32ff2ced954f7b4fe3ec9e21 100644
+index 996c8326387b5a7fe62db6a76e000144565cb85b..1fcb1bdab28f79320aef50a9bbb2fbee8c7a2964 100644
 --- a/src/main/java/net/minecraft/server/NibbleArray.java
 +++ b/src/main/java/net/minecraft/server/NibbleArray.java
 @@ -1,16 +1,50 @@
@@ -97,7 +97,7 @@ index 996c8326387b5a7fe62db6a76e000144565cb85b..af32197dc82e3ebf32ff2ced954f7b4f
 +    // Paper start
 +    public static byte[] EMPTY_NIBBLE = new byte[2048];
 +    private static final int nibbleBucketSizeMultiplier = Integer.getInteger("Paper.nibbleBucketSize", 3072);
-+    private static final int maxPoolSize = Integer.getInteger("Paper.maxNibblePoolSize", (int) Math.min(6, Runtime.getRuntime().maxMemory() / 1024 / 1024 / 1024) * (nibbleBucketSizeMultiplier * 8));
++    private static final int maxPoolSize = Integer.getInteger("Paper.maxNibblePoolSize", (int) Math.min(6, Math.max(1, Runtime.getRuntime().maxMemory() / 1024 / 1024 / 1024)) * (nibbleBucketSizeMultiplier * 8));
 +    public static final PooledObjects<byte[]> BYTE_2048 = new PooledObjects<>(() -> new byte[2048], maxPoolSize, 8);
 +    public static void releaseBytes(byte[] bytes) {
 +        if (bytes != null && bytes != EMPTY_NIBBLE && bytes.length == 2048) {

Spigot-Server-Patches/0528-Workaround-for-Client-Lag-Spikes-MC-162253.patch

@@ -37,10 +37,10 @@ index b7b06e082e59f8518be2036637385c7710d524ea..71da9f00b8a969e84414066fb1852cec
          return chunksection == Chunk.a || chunksection.c();
      }
 diff --git a/src/main/java/net/minecraft/server/PlayerChunkMap.java b/src/main/java/net/minecraft/server/PlayerChunkMap.java
-index 263cc1e0a476797a73c37724326feec37f114ecf..018ef2c516dbf1997cedc378ed3b42cdaeab5a7d 100644
+index af6d28a99adc94ae425520d7f6c125bb03654212..f11ec68a111dae31d0389a2bd09cb0bf7a9b88e3 100644
 --- a/src/main/java/net/minecraft/server/PlayerChunkMap.java
 +++ b/src/main/java/net/minecraft/server/PlayerChunkMap.java
-@@ -376,7 +376,7 @@ public class PlayerChunkMap extends IChunkLoader implements PlayerChunk.d {
+@@ -379,7 +379,7 @@ public class PlayerChunkMap extends IChunkLoader implements PlayerChunk.d {
                      player.needsChunkCenterUpdate = false;
                      player.playerConnection.sendPacket(new PacketPlayOutViewCentre(currPosX, currPosZ));
                  }
@@ -49,7 +49,7 @@ index 263cc1e0a476797a73c37724326feec37f114ecf..018ef2c516dbf1997cedc378ed3b42cd
              },
              (EntityPlayer player, int rangeX, int rangeZ, int currPosX, int currPosZ, int prevPosX, int prevPosZ,
               com.destroystokyo.paper.util.misc.PooledLinkedHashSets.PooledObjectLinkedOpenHashSet<EntityPlayer> newState) -> {
-@@ -1955,12 +1955,112 @@ public class PlayerChunkMap extends IChunkLoader implements PlayerChunk.d {
+@@ -1944,12 +1944,112 @@ public class PlayerChunkMap extends IChunkLoader implements PlayerChunk.d {
  
      }