add missing license headers

core/src/main/java/org/elasticsearch/http/netty/pipelining/HttpPipeliningHandler.java

@@ -1,5 +1,27 @@
 package org.elasticsearch.http.netty.pipelining;
 
+/*
+ * Licensed to Elasticsearch under one or more contributor
+ * license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright
+ * ownership. Elasticsearch licenses this file to you 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.
+ */
+
+// this file is from netty-http-pipelining, under apache 2.0 license
+// see github.com/typesafehub/netty-http-pipelining
+
 import org.elasticsearch.common.logging.ESLogger;
 import org.elasticsearch.common.logging.ESLoggerFactory;
 import org.jboss.netty.channel.*;

core/src/main/java/org/elasticsearch/http/netty/pipelining/OrderedDownstreamChannelEvent.java

@@ -1,5 +1,27 @@
 package org.elasticsearch.http.netty.pipelining;
 
+/*
+ * Licensed to Elasticsearch under one or more contributor
+ * license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright
+ * ownership. Elasticsearch licenses this file to you 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.
+ */
+
+// this file is from netty-http-pipelining, under apache 2.0 license
+// see github.com/typesafehub/netty-http-pipelining
+
 import org.jboss.netty.channel.*;
 
 /**

core/src/main/java/org/elasticsearch/http/netty/pipelining/OrderedUpstreamMessageEvent.java

@@ -1,5 +1,27 @@
 package org.elasticsearch.http.netty.pipelining;
 
+/*
+ * Licensed to Elasticsearch under one or more contributor
+ * license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright
+ * ownership. Elasticsearch licenses this file to you 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.
+ */
+
+// this file is from netty-http-pipelining, under apache 2.0 license
+// see github.com/typesafehub/netty-http-pipelining
+
 import org.jboss.netty.channel.Channel;
 import org.jboss.netty.channel.UpstreamMessageEvent;