obsolete copy_settings as of 6.4 (#3416)

It will no longer allow false and will be removed on the server in 8.x, and in the client in 7.x 

(cherry picked from commit 559367b)

Author: Mpdreamz

src/CodeGeneration/ApiGenerator/Overrides/GlobalOverrides.cs

@@ -35,7 +35,8 @@ public class GlobalOverrides : EndpointOverridesBase
 		public override IDictionary<string, string> ObsoleteQueryStringParams { get; set; } = new Dictionary<string, string>
 		{
 			{ "parent", "the parent parameter has been deprecated from elasticsearch, please use routing instead directly."},
-			{ "update_all_types", "Elasticsearch 6.x only allows a single type per index so this parameter is now useless"}
+			{ "update_all_types", "Elasticsearch 6.x only allows a single type per index so this parameter is now useless"},
+			{ "copy_settings", "Elasticsearch 6.4 will throw an exception if this is turned off see elastic/elasticsearch#30404"}
 		};
 
 		public override IEnumerable<string> SkipQueryStringParams { get; } = new[]

src/Elasticsearch.Net/Domain/RequestParameters/RequestParameters.Generated.cs

@@ -1434,6 +1434,7 @@ public partial class ShrinkIndexRequestParameters : RequestParameters<ShrinkInde
 	{
 		public override HttpMethod DefaultHttpMethod => HttpMethod.PUT;
 		///<summary>whether or not to copy settings from the source index (defaults to false)</summary>
+		[Obsolete("Scheduled to be removed in 7.0, Elasticsearch 6.4 will throw an exception if this is turned off see elastic/elasticsearch#30404")]
 		public bool? CopySettings { get => Q<bool?>("copy_settings"); set => Q("copy_settings", value); }
 		///<summary>Explicit operation timeout</summary>
 		public TimeSpan Timeout { get => Q<TimeSpan>("timeout"); set => Q("timeout", value); }
@@ -1447,6 +1448,7 @@ public partial class SplitIndexRequestParameters : RequestParameters<SplitIndexR
 	{
 		public override HttpMethod DefaultHttpMethod => HttpMethod.PUT;
 		///<summary>whether or not to copy settings from the source index (defaults to false)</summary>
+		[Obsolete("Scheduled to be removed in 7.0, Elasticsearch 6.4 will throw an exception if this is turned off see elastic/elasticsearch#30404")]
 		public bool? CopySettings { get => Q<bool?>("copy_settings"); set => Q("copy_settings", value); }
 		///<summary>Explicit operation timeout</summary>
 		public TimeSpan Timeout { get => Q<TimeSpan>("timeout"); set => Q("timeout", value); }

src/Nest/_Generated/_Descriptors.generated.cs

@@ -2513,6 +2513,7 @@ public ShrinkIndexDescriptor(IndexName index, IndexName target) : base(r=>r.Requ
 		// Request parameters
 
 		///<summary>whether or not to copy settings from the source index (defaults to false)</summary>
+		[Obsolete("Scheduled to be removed in 7.0, Elasticsearch 6.4 will throw an exception if this is turned off see elastic/elasticsearch#30404")]
 		public ShrinkIndexDescriptor CopySettings(bool? copySettings = true) => Qs("copy_settings", copySettings);
 		///<summary>Explicit operation timeout</summary>
 		public ShrinkIndexDescriptor Timeout(Time timeout) => Qs("timeout", timeout);
@@ -2541,6 +2542,7 @@ public SplitIndexDescriptor(IndexName index, IndexName target) : base(r=>r.Requi
 		// Request parameters
 
 		///<summary>whether or not to copy settings from the source index (defaults to false)</summary>
+		[Obsolete("Scheduled to be removed in 7.0, Elasticsearch 6.4 will throw an exception if this is turned off see elastic/elasticsearch#30404")]
 		public SplitIndexDescriptor CopySettings(bool? copySettings = true) => Qs("copy_settings", copySettings);
 		///<summary>Explicit operation timeout</summary>
 		public SplitIndexDescriptor Timeout(Time timeout) => Qs("timeout", timeout);

src/Nest/_Generated/_Requests.generated.cs

@@ -5550,6 +5550,7 @@ public ShrinkIndexRequest(IndexName index, IndexName target) : base(r=>r.Require
 
 		// Request parameters
 		///<summary>whether or not to copy settings from the source index (defaults to false)</summary>
+		[Obsolete("Scheduled to be removed in 7.0, Elasticsearch 6.4 will throw an exception if this is turned off see elastic/elasticsearch#30404")]
 		public bool? CopySettings { get => Q<bool?>("copy_settings"); set => Q("copy_settings", value); }
 		///<summary>Explicit operation timeout</summary>
 		public Time Timeout { get => Q<Time>("timeout"); set => Q("timeout", value); }
@@ -5881,6 +5882,7 @@ public SplitIndexRequest(IndexName index, IndexName target) : base(r=>r.Required
 
 		// Request parameters
 		///<summary>whether or not to copy settings from the source index (defaults to false)</summary>
+		[Obsolete("Scheduled to be removed in 7.0, Elasticsearch 6.4 will throw an exception if this is turned off see elastic/elasticsearch#30404")]
 		public bool? CopySettings { get => Q<bool?>("copy_settings"); set => Q("copy_settings", value); }
 		///<summary>Explicit operation timeout</summary>
 		public Time Timeout { get => Q<Time>("timeout"); set => Q("timeout", value); }