*: update license and remove unused packages (#5)

*: update license and remove packages

*: update protocol licence

pkg/proxy/backend/authenticator.go

@@ -1,4 +1,3 @@
-// Copyright 2020 Ipalfish, Inc.
 // Copyright 2022 PingCAP, Inc.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");

pkg/proxy/backend/backend_conn.go

@@ -1,4 +1,3 @@
-// Copyright 2020 Ipalfish, Inc.
 // Copyright 2022 PingCAP, Inc.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");

pkg/proxy/backend/backend_conn_mgr.go

@@ -1,4 +1,3 @@
-// Copyright 2020 Ipalfish, Inc.
 // Copyright 2022 PingCAP, Inc.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");

pkg/proxy/backend/cmd_processor.go

@@ -1,4 +1,3 @@
-// Copyright 2020 Ipalfish, Inc.
 // Copyright 2022 PingCAP, Inc.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");

pkg/proxy/client/client_conn.go

@@ -1,4 +1,3 @@
-// Copyright 2020 Ipalfish, Inc.
 // Copyright 2022 PingCAP, Inc.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");

pkg/proxy/net/protocol.go

@@ -1,5 +1,25 @@
-// Copyright 2020 Ipalfish, Inc.
-// Copyright 2022 PingCAP, Inc.
+// Copyright 2013 The Go-MySQL-Driver Authors. All rights reserved.
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this file,
+// You can obtain one at http://mozilla.org/MPL/2.0/.
+
+// The MIT License (MIT)
+//
+// Copyright (c) 2014 wandoulabs
+// Copyright (c) 2014 siddontang
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy of
+// this software and associated documentation files (the "Software"), to deal in
+// the Software without restriction, including without limitation the rights to
+// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+// the Software, and to permit persons to whom the Software is furnished to do so,
+// subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in all
+// copies or substantial portions of the Software.
+
+// Copyright 2015 PingCAP, Inc.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.