Merge branch 'master' into hd/bugfix

Author: sebastienlagarde

com.unity.render-pipelines.universal/CHANGELOG.md

@@ -16,6 +16,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 - Added 2D Renderer Asset Preset for creating a Universal Renderer Asset
 - Added an option to use faster, but less accurate approximation functions when converting between the sRGB and Linear color spaces.
 - Added screen space shadow as renderer feature
+- Added [DisallowMultipleRendererFeature] attribute for Renderer Features.
 
 ### Changed
 - Optimized 2D Renderer performance on mobile GPUs by reducing the number of render target switches.

com.unity.render-pipelines.universal/Runtime/RendererFeatures/DisallowMultipleRendererFeature.cs

@@ -6,7 +6,7 @@ namespace UnityEngine.Rendering.Universal
     ///   <para>Prevents ScriptableRendererFeatures of same type to be added more than once to a Scriptable Renderer.</para>
     /// </summary>
     [AttributeUsage(AttributeTargets.Class)]
-    internal class DisallowMultipleRendererFeature : Attribute
+    public class DisallowMultipleRendererFeature : Attribute
     {
     }
 }