license: Relicense under Apache-2.0

bukkit/src/main/java/net/william278/husksync/BukkitHuskSync.java

@@ -1,14 +1,20 @@
 /*
- * This file is part of HuskSync by William278. Do not redistribute!
+ * This file is part of HuskSync, licensed under the Apache License 2.0.
  *
  *  Copyright (c) William278 <will27528@gmail.com>
- *  All rights reserved.
+ *  Copyright (c) contributors
  *
- *  This source code is provided as reference to licensed individuals that have purchased the HuskSync
- *  plugin once from any of the official sources it is provided. The availability of this code does
- *  not grant you the rights to modify, re-distribute, compile or redistribute this source code or
- *  "plugin" outside this intended purpose. This license does not cover libraries developed by third
- *  parties that are utilised in the plugin.
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
  */
 
 package net.william278.husksync;