Merge in 'release/6.0' changes

.azure/pipelines/richnav.yml

Directory.Build.props

Directory.Build.targets

eng/Version.Details.xml

eng/Versions.props

eng/common/templates/steps/source-build.yml

global.json

...Msal/src/Microsoft.Authentication.WebAssembly.Msal.csproj

...t.AspNetCore.Components.WebAssembly.Authentication.csproj

src/Mvc/test/Mvc.FunctionalTests/ErrorPageTests.cs

src/Servers/HttpSys/HttpSysServer.slnf

src/Servers/HttpSys/src/DelegationRule.cs

src/Servers/HttpSys/src/NativeInterop/RequestQueue.cs

src/Servers/HttpSys/src/NativeInterop/UrlGroup.cs

src/Servers/HttpSys/src/RequestProcessing/Request.cs

src/Servers/HttpSys/src/RequestProcessing/RequestContext.cs

src/Servers/HttpSys/src/ServerDelegationPropertyFeature.cs

src/Servers/HttpSys/test/FunctionalTests/DelegateTests.cs

...rvers/IIS/IIS/test/Common.FunctionalTests/StartupTests.cs

src/Servers/Kestrel/Core/src/Internal/Http/HttpParser.cs