Fix some licenses in our own code (#56978)

All of these files were written by us, and not sourced from
anywhere. Therefore, the license head should be granting licenses to
Elasticsearch, rathern than to the ASF. This commit address them by
changing the license to our standard Apache 2.0 license header.

libs/core/src/main/java/org/elasticsearch/core/internal/net/NetUtils.java

@@ -1,19 +1,22 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
+ * Licensed to Elasticsearch under one or more contributor
- * contributor license agreements.  See the NOTICE file distributed with
+ * license agreements. See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
+ * this work for additional information regarding copyright
- * The ASF licenses this file to You under the Apache License, Version 2.0
+ * ownership. Elasticsearch licenses this file to you under
- * (the "License"); you may not use this file except in compliance with
+ * the Apache License, Version 2.0 (the "License"); you may
- * the License.  You may obtain a copy of the License at
+ * 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
+ *    http://www.apache.org/licenses/LICENSE-2.0
  *
- * Unless required by applicable law or agreed to in writing, software
+ * Unless required by applicable law or agreed to in writing,
- * distributed under the License is distributed on an "AS IS" BASIS,
+ * software distributed under the License is distributed on an
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * See the License for the specific language governing permissions and
+ * KIND, either express or implied.  See the License for the
- * limitations under the License.
+ * specific language governing permissions and limitations
+ * under the License.
  */
+
 package org.elasticsearch.core.internal.net;
 
 import java.lang.reflect.Field;

libs/core/src/test/java/org/elasticsearch/core/internal/net/NetUtilsTests.java

@@ -1,19 +1,22 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
+ * Licensed to Elasticsearch under one or more contributor
- * contributor license agreements.  See the NOTICE file distributed with
+ * license agreements. See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
+ * this work for additional information regarding copyright
- * The ASF licenses this file to You under the Apache License, Version 2.0
+ * ownership. Elasticsearch licenses this file to you under
- * (the "License"); you may not use this file except in compliance with
+ * the Apache License, Version 2.0 (the "License"); you may
- * the License.  You may obtain a copy of the License at
+ * 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
+ *    http://www.apache.org/licenses/LICENSE-2.0
  *
- * Unless required by applicable law or agreed to in writing, software
+ * Unless required by applicable law or agreed to in writing,
- * distributed under the License is distributed on an "AS IS" BASIS,
+ * software distributed under the License is distributed on an
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * See the License for the specific language governing permissions and
+ * KIND, either express or implied.  See the License for the
- * limitations under the License.
+ * specific language governing permissions and limitations
+ * under the License.
  */
+
 package org.elasticsearch.core.internal.net;
 
 import org.apache.lucene.util.Constants;

server/src/test/java/org/elasticsearch/index/seqno/GlobalCheckpointSyncActionTests.java

@@ -1,18 +1,20 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
+ * Licensed to Elasticsearch under one or more contributor
- * contributor license agreements. See the NOTICE file distributed with
+ * license agreements. See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
+ * this work for additional information regarding copyright
- * The ASF licenses this file to You under the Apache license, Version 2.0
+ * ownership. Elasticsearch licenses this file to you under
- * (the "License"); you may not use this file except in compliance with
+ * the Apache License, Version 2.0 (the "License"); you may
- * the License. You may obtain a copy of the License at
+ * 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
+ *    http://www.apache.org/licenses/LICENSE-2.0
  *
- * Unless required by applicable law or agreed to in writing, software
+ * Unless required by applicable law or agreed to in writing,
- * distributed under the License is distributed on an "AS IS" BASIS,
+ * software distributed under the License is distributed on an
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * See the license for the specific language governing permissions and
+ * KIND, either express or implied.  See the License for the
- * limitations under the license.
+ * specific language governing permissions and limitations
+ * under the License.
  */
 
 package org.elasticsearch.index.seqno;

server/src/test/java/org/elasticsearch/index/seqno/RetentionLeaseBackgroundSyncActionTests.java

@@ -1,18 +1,20 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
+ * Licensed to Elasticsearch under one or more contributor
- * contributor license agreements. See the NOTICE file distributed with
+ * license agreements. See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
+ * this work for additional information regarding copyright
- * The ASF licenses this file to You under the Apache license, Version 2.0
+ * ownership. Elasticsearch licenses this file to you under
- * (the "License"); you may not use this file except in compliance with
+ * the Apache License, Version 2.0 (the "License"); you may
- * the License. You may obtain a copy of the License at
+ * 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
+ *    http://www.apache.org/licenses/LICENSE-2.0
  *
- * Unless required by applicable law or agreed to in writing, software
+ * Unless required by applicable law or agreed to in writing,
- * distributed under the License is distributed on an "AS IS" BASIS,
+ * software distributed under the License is distributed on an
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * See the license for the specific language governing permissions and
+ * KIND, either express or implied.  See the License for the
- * limitations under the license.
+ * specific language governing permissions and limitations
+ * under the License.
  */
 
 package org.elasticsearch.index.seqno;

server/src/test/java/org/elasticsearch/index/seqno/RetentionLeaseSyncActionTests.java

@@ -1,18 +1,20 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
+ * Licensed to Elasticsearch under one or more contributor
- * contributor license agreements. See the NOTICE file distributed with
+ * license agreements. See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
+ * this work for additional information regarding copyright
- * The ASF licenses this file to You under the Apache license, Version 2.0
+ * ownership. Elasticsearch licenses this file to you under
- * (the "License"); you may not use this file except in compliance with
+ * the Apache License, Version 2.0 (the "License"); you may
- * the License. You may obtain a copy of the License at
+ * 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
+ *    http://www.apache.org/licenses/LICENSE-2.0
  *
- * Unless required by applicable law or agreed to in writing, software
+ * Unless required by applicable law or agreed to in writing,
- * distributed under the License is distributed on an "AS IS" BASIS,
+ * software distributed under the License is distributed on an
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * See the license for the specific language governing permissions and
+ * KIND, either express or implied.  See the License for the
- * limitations under the license.
+ * specific language governing permissions and limitations
+ * under the License.
  */
 
 package org.elasticsearch.index.seqno;