Fix moniker ranges to eliminate duplicate headers

Co-authored-by: tdykstra <[email protected]>

Author: Copilot

aspnetcore/fundamentals/servers/kestrel.md

@@ -14,7 +14,7 @@ uid: fundamentals/servers/kestrel
 
 By [Tom Dykstra](https://github.com/tdykstra), [Chris Ross](https://github.com/Tratcher), and [Stephen Halter](https://twitter.com/halter73)
 
-:::moniker range=">= aspnetcore-8.0"
+:::moniker range=">= aspnetcore-10.0"
 
 Kestrel is a cross-platform [web server for ASP.NET Core](xref:fundamentals/servers/index). Kestrel is the recommended server for ASP.NET Core, and it's configured by default in ASP.NET Core project templates.
 
@@ -33,17 +33,8 @@ Kestrel's features include:
   * Building a reverse proxy with [YARP](https://github.com/microsoft/reverse-proxy).
 * **Extensibility:** Customize Kestrel through configuration, middleware, and custom transports.
 * **Performance diagnostics:** Kestrel provides built-in performance diagnostics features, such as logging and metrics.
-
-:::moniker-end
-
-:::moniker range=">= aspnetcore-10.0"
-
 * **Memory management:** Kestrel includes features for efficient memory management. For more information, see <xref:fundamentals/servers/kestrel/memory-management>.
 
-:::moniker-end
-
-:::moniker range=">= aspnetcore-8.0"
-
 ## Get started
 
 ASP.NET Core project templates use Kestrel by default when not hosted with IIS. In the following template-generated `Program.cs`, the <xref:Microsoft.AspNetCore.Builder.WebApplication.CreateBuilder%2A?displayProperty=nameWithType> method calls <xref:Microsoft.AspNetCore.Hosting.WebHostBuilderKestrelExtensions.UseKestrel%2A> internally:

aspnetcore/fundamentals/servers/kestrel/includes/kestrel6.md

@@ -1,4 +1,64 @@
-:::moniker range=">= aspnetcore-6.0 <=aspnetcore-9.0"
+:::moniker range=">= aspnetcore-8.0 <= aspnetcore-9.0"
+
+Kestrel is a cross-platform [web server for ASP.NET Core](xref:fundamentals/servers/index). Kestrel is the recommended server for ASP.NET Core, and it's configured by default in ASP.NET Core project templates.
+
+Kestrel's features include:
+
+* **Cross-platform:** Kestrel is a cross-platform web server that runs on Windows, Linux, and macOS.
+* **High performance:** Kestrel is optimized to handle a large number of concurrent connections efficiently.
+* **Lightweight:** Optimized for running in resource-constrained environments, such as containers and edge devices.
+* **Security hardened:** Kestrel supports HTTPS and is hardened against web server vulnerabilities.
+* **Wide protocol support:** Kestrel supports common web protocols, including:
+  * HTTP/1.1, [HTTP/2](xref:fundamentals/servers/kestrel/http2) and [HTTP/3](xref:fundamentals/servers/kestrel/http3)
+  * [WebSockets](xref:fundamentals/websockets)
+* **Integration with ASP.NET Core:** Seamless integration with other ASP.NET Core components, such as the middleware pipeline, dependency injection, and configuration system.
+* **Flexible workloads**: Kestrel supports many workloads:
+  * ASP.NET app frameworks such as Minimal APIs, MVC, Razor pages, SignalR, Blazor, and gRPC.
+  * Building a reverse proxy with [YARP](https://github.com/microsoft/reverse-proxy).
+* **Extensibility:** Customize Kestrel through configuration, middleware, and custom transports.
+* **Performance diagnostics:** Kestrel provides built-in performance diagnostics features, such as logging and metrics.
+
+## Get started
+
+ASP.NET Core project templates use Kestrel by default when not hosted with IIS. In the following template-generated `Program.cs`, the <xref:Microsoft.AspNetCore.Builder.WebApplication.CreateBuilder%2A?displayProperty=nameWithType> method calls <xref:Microsoft.AspNetCore.Hosting.WebHostBuilderKestrelExtensions.UseKestrel%2A> internally:
+
+:::code language="csharp" source="~/fundamentals/servers/kestrel/samples/6.x/KestrelSample/Program.cs" id="snippet_CreateBuilder" highlight="1":::
+
+For more information on configuring `WebApplication` and `WebApplicationBuilder`, see <xref:fundamentals/minimal-apis>.
+
+## Behavior with debugger attached
+
+The following timeouts and rate limits aren't enforced when a debugger is attached to a Kestrel process:
+
+* <xref:Microsoft.AspNetCore.Server.Kestrel.KestrelServerLimits.KeepAliveTimeout?displayProperty=nameWithType>
+* <xref:Microsoft.AspNetCore.Server.Kestrel.KestrelServerLimits.RequestHeadersTimeout?displayProperty=nameWithType>
+* <xref:Microsoft.AspNetCore.Server.Kestrel.Core.KestrelServerLimits.MinRequestBodyDataRate?displayProperty=nameWithType>
+* <xref:Microsoft.AspNetCore.Server.Kestrel.Core.KestrelServerLimits.MinResponseDataRate?displayProperty=nameWithType>
+* <xref:Microsoft.AspNetCore.Server.Kestrel.Core.Features.IConnectionTimeoutFeature>
+* <xref:Microsoft.AspNetCore.Server.Kestrel.Core.Features.IHttpMinRequestBodyDataRateFeature>
+* <xref:Microsoft.AspNetCore.Server.Kestrel.Core.Features.IHttpMinResponseDataRateFeature>
+
+## Additional resources
+
+<a name="endpoint-configuration"></a>
+* <xref:fundamentals/servers/kestrel/endpoints>
+<a name="kestrel-options"></a>
+* <xref:fundamentals/servers/kestrel/options>
+<a name="http2-support"></a>
+* <xref:fundamentals/servers/kestrel/http2>
+<a name="when-to-use-kestrel-with-a-reverse-proxy"></a>
+* <xref:fundamentals/servers/kestrel/when-to-use-a-reverse-proxy>
+<a name="host-filtering"></a>
+* <xref:fundamentals/servers/kestrel/host-filtering>
+* <xref:test/troubleshoot>
+* <xref:security/enforcing-ssl>
+* <xref:host-and-deploy/proxy-load-balancer>
+* [RFC 9110: HTTP Semantics (Section 7.2: Host and :authority)](https://www.rfc-editor.org/rfc/rfc9110#field.host)
+* When using UNIX sockets on Linux, the socket isn't automatically deleted on app shutdown. For more information, see [this GitHub issue](https://github.com/dotnet/aspnetcore/issues/14134).
+
+:::moniker-end
+
+:::moniker range=">= aspnetcore-6.0 < aspnetcore-8.0"
 
 Kestrel is a cross-platform [web server for ASP.NET Core](xref:fundamentals/servers/index). Kestrel is the web server that's included and enabled by default in ASP.NET Core project templates.