ASP.NET Core 3.0 change in routing

[lmolkova]

ASP.NET Core changed how routing is done in 3.0 and we won't get MVC events anymore https://devblogs.microsoft.com/aspnet/aspnet-core-3-preview-2/.

Here is the PR in ASP.NET Core that shows how we can get routing working again dotnet/aspnetcore#11685

[davidfowl]

ASP.NET Core changed how routing is done in 3.0 and we won't get MVC events anymore

The MVC events still fire so it won't break the existing system. Those fire deep within MVC after routing happens.

[lmolkova]

@davidfowl thanks for the explanation.

[lmolkova]

dup of #936