Use Netty thread factory to take advantage of FastThreadLocal

This should reduce CPU usage slightly.

native/src/main/java/com/velocitypowered/natives/encryption/JavaVelocityCipher.java

@@ -4,6 +4,7 @@ import com.google.common.base.Preconditions;
 import io.netty.buffer.ByteBuf;
 import io.netty.buffer.Unpooled;
 import io.netty.channel.ChannelHandlerContext;
+import io.netty.util.concurrent.FastThreadLocal;
 import java.security.GeneralSecurityException;
 import javax.crypto.Cipher;
 import javax.crypto.SecretKey;
@@ -24,8 +25,12 @@ public class JavaVelocityCipher implements VelocityCipher {
     }
   };
   private static final int INITIAL_BUFFER_SIZE = 1024 * 8;
-  private static final ThreadLocal<byte[]> inBufLocal = ThreadLocal.withInitial(
-      () -> new byte[INITIAL_BUFFER_SIZE]);
+  private static final FastThreadLocal<byte[]> inBufLocal = new FastThreadLocal<byte[]>() {
+    @Override
+    protected byte[] initialValue() {
+      return new byte[INITIAL_BUFFER_SIZE];
+    }
+  };
 
   private final Cipher cipher;
   private boolean disposed = false;

proxy/src/main/java/com/velocitypowered/proxy/network/TransportType.java

@@ -19,6 +19,7 @@ import io.netty.channel.socket.SocketChannel;
 import io.netty.channel.socket.nio.NioDatagramChannel;
 import io.netty.channel.socket.nio.NioServerSocketChannel;
 import io.netty.channel.socket.nio.NioSocketChannel;
+import io.netty.util.concurrent.DefaultThreadFactory;
 import java.util.concurrent.ThreadFactory;
 import java.util.function.BiFunction;
 
@@ -60,10 +61,7 @@ enum TransportType {
   }
 
   private static ThreadFactory createThreadFactory(final String name, final Type type) {
-    return new ThreadFactoryBuilder()
-        .setNameFormat("Netty " + name + ' ' + type.toString() + " #%d")
-        .setDaemon(true)
-        .build();
+    return new DefaultThreadFactory("Netty " + name + ' ' + type.toString(), false);
   }
 
   public static TransportType bestType() {