add original license for Batch method

Author: cypressious

src/InfluxDB.Collector/Util/EnumerableExtensions.cs

@@ -5,7 +5,23 @@ namespace InfluxDB.Collector.Util
 {
     internal static class EnumerableExtensions
     {
-        // from https://github.com/morelinq/MoreLINQ/blob/master/MoreLinq/Batch.cs
+        // Copied from https://github.com/morelinq/MoreLINQ/blob/master/MoreLinq/Batch.cs
+        // Original license below
+        //
+        // MoreLINQ - Extensions to LINQ to Objects
+        // Copyright (c) 2009 Atif Aziz. All rights reserved.
+        //
+        // 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.
         public static IEnumerable<IEnumerable<TSource>> Batch<TSource>(this IEnumerable<TSource> source, int size)
         {
             TSource[] bucket = null;