Session: obsolete APIs removed in 3.0

[JunTaoLuo]

This is a follow up to #257. The 3.0 release will remove the obsolete Cookie APIs in Session.

The recommended changes are:

public void ConfigureServices(ServiceCollection services)
{
    services.AddSession(options =>
    {
        // Removed obsolete APIs
        options.CookieName = "SessionCookie";
        options.CookieDomain = "contoso.com";
        options.CookiePath = "/";
        options.CookieHttpOnly = true;
        options.CookieSecure = CookieSecurePolicy.Always;
        // new API
        options.Cookie.Name = "SessionCookie";
        options.Cookie.Domain = "contoso.com";
        options.Cookie.Path = "/";
        options.Cookie.HttpOnly = true;
        options.Cookie.SecurePolicy = CookieSecurePolicy.Always;
    });
}

See the linked issue for more details and discussion.

[This announcement has been migrated to: dotnet/docs#14844]