Add IServerInformation to IBuilder.

src/Microsoft.AspNet.Abstractions/IBuilder.cs

@@ -5,6 +5,7 @@ namespace Microsoft.AspNet.Abstractions
     public interface IBuilder
     {
         IServiceProvider ServiceProvider { get; set; }
+        IServerInformation Server { get; set; }
 
         IBuilder Use(Func<RequestDelegate, RequestDelegate> middleware);
         IBuilder Run(RequestDelegate handler);

src/Microsoft.AspNet.Abstractions/IServerInformation.cs

@@ -0,0 +1,9 @@
+
+namespace Microsoft.AspNet.Abstractions
+{
+    // TODO: [AssemblyNeutral]
+    public interface IServerInformation
+    {
+        string Name { get; }
+    }
+}

src/Microsoft.AspNet.PipelineCore/Builder.cs

@@ -14,7 +14,14 @@ namespace Microsoft.AspNet.PipelineCore
             ServiceProvider = serviceProvider;
         }
 
+        internal Builder(Builder builder)
+        {
+            ServiceProvider = builder.ServiceProvider;
+            Server = builder.Server;
+        }
+
         public IServiceProvider ServiceProvider { get; set; }
+        public IServerInformation Server { get; set; }
 
         public IBuilder Use(Func<RequestDelegate, RequestDelegate> middleware)
         {
@@ -29,7 +36,7 @@ namespace Microsoft.AspNet.PipelineCore
 
         public IBuilder New()
         {
-            return new Builder(ServiceProvider);
+            return new Builder(this);
         }
 
         public RequestDelegate Build()