more work on channel downloading

MediaBrowser.Controller/Entities/IHasMediaSources.cs

@@ -0,0 +1,15 @@
+using MediaBrowser.Model.Dto;
+using System.Collections.Generic;
+
+namespace MediaBrowser.Controller.Entities
+{
+    public interface IHasMediaSources
+    {
+        /// <summary>
+        /// Gets the media sources.
+        /// </summary>
+        /// <param name="enablePathSubstitution">if set to <c>true</c> [enable path substitution].</param>
+        /// <returns>Task{IEnumerable{MediaSourceInfo}}.</returns>
+        IEnumerable<MediaSourceInfo> GetMediaSources(bool enablePathSubstitution);
+    }
+}