Merge remote-tracking branch 'origin/v10/dev' into v10/feature/nullable-reference-types-in-Umbraco-Core

# Conflicts:
#	src/Umbraco.Core/Configuration/Models/SecuritySettings.cs
#	src/Umbraco.Core/Events/DeleteEventArgs.cs
#	src/Umbraco.Core/Events/IEventDispatcher.cs
#	src/Umbraco.Core/Events/PassThroughEventDispatcher.cs
#	src/Umbraco.Core/Events/QueuingEventDispatcherBase.cs
#	src/Umbraco.Core/IO/MediaFileManager.cs
#	src/Umbraco.Core/Models/Mapping/MemberTabsAndPropertiesMapper.cs
#	src/Umbraco.Core/PropertyEditors/DataValueEditor.cs
#	src/Umbraco.Core/Routing/DefaultUrlProvider.cs

src/Umbraco.Core/Configuration/Models/HostingSettings.cs

@@ -31,5 +31,10 @@ namespace Umbraco.Cms.Core.Configuration.Models
         /// <value><c>true</c> if [debug mode]; otherwise, <c>false</c>.</value>
         [DefaultValue(StaticDebug)]
         public bool Debug { get; set; } = StaticDebug;
+
+        /// <summary>
+        /// Gets or sets a value specifying the name of the site.
+        /// </summary>
+        public string SiteName { get; set; }
     }
 }