Add API to configure shutdown timeout

[davidfowl]

Seems we only read it from configuration now.

[Tratcher]

There's also StopAsync(this IWebHost host, TimeSpan timeout)

[davidfowl]

Yea, there is, we should add a top level method for configuring options. Just like prefer hosting urls.

[muratg]

Related to #1016.

[BrennanConroy]

What do we want to name the extension method?
public static IWebHostBuilder UseShutdownTimeout(this IWebHostBuilder hostBuilder, TimeSpan timeout)
Or
public static IWebHostBuilder ConfigureShutdownTimeout(this IWebHostBuilder hostBuilder, TimeSpan timeout)
Or
public static IWebHostBuilder SetShutdownTimeout(this IWebHostBuilder hostBuilder, TimeSpan timeout)

[Tratcher]

UseShutdownTimeout would be the most consistent.

Hosting/src/Microsoft.AspNetCore.Hosting.Abstractions/HostingAbstractionsWebHostBuilderExtensions.cs

Line 139 in b6f558d

public static IWebHostBuilder UseUrls(this IWebHostBuilder hostBuilder, params string[] urls)

[davidfowl]

I want to kill all of these extension methods and do this instead #1042

[BrennanConroy]

03bdb40