Really suppress the initial connection stuff

proxy/src/main/java/com/velocitypowered/proxy/connection/MinecraftConnection.java

@@ -16,6 +16,7 @@ import com.velocitypowered.natives.encryption.VelocityCipher;
 import com.velocitypowered.natives.encryption.VelocityCipherFactory;
 import com.velocitypowered.natives.util.Natives;
 import com.velocitypowered.proxy.VelocityServer;
+import com.velocitypowered.proxy.connection.client.InitialInboundConnection;
 import com.velocitypowered.proxy.protocol.MinecraftPacket;
 import com.velocitypowered.proxy.protocol.StateRegistry;
 import com.velocitypowered.proxy.protocol.netty.MinecraftCipherDecoder;
@@ -90,7 +91,8 @@ public class MinecraftConnection extends ChannelInboundHandlerAdapter {
       sessionHandler.disconnected();
     }
 
-    if (association != null && !knownDisconnect) {
+    if (association != null && !knownDisconnect
+        && !(association instanceof InitialInboundConnection)) {
       logger.info("{} has disconnected", association);
     }
   }

proxy/src/main/java/com/velocitypowered/proxy/connection/client/InitialInboundConnection.java

@@ -13,7 +13,8 @@ import net.kyori.text.serializer.legacy.LegacyComponentSerializer;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 
-class InitialInboundConnection implements InboundConnection, MinecraftConnectionAssociation {
+public final class InitialInboundConnection implements InboundConnection,
+    MinecraftConnectionAssociation {
 
   private static final Logger logger = LogManager.getLogger(InitialInboundConnection.class);
 
@@ -53,6 +54,10 @@ class InitialInboundConnection implements InboundConnection, MinecraftConnection
     return "[initial connection] " + connection.getRemoteAddress().toString();
   }
 
+  /**
+   * Disconnects the connection from the server.
+   * @param reason the reason for disconnecting
+   */
   public void disconnect(Component reason) {
     logger.info("{} has disconnected: {}", this,
         LegacyComponentSerializer.legacy().serialize(reason));