Fix #621 and fix #339 - at least this change should eliminate situati…

…on where rendering target pages (to register Dynamic Data Url Mappers) may fail due to target page URL containing /c1mode(relative). This area is still not perfect - this should be an in proc process to ensure it will execute in the same process (going via http request may hit another server or be blocked).

Composite/Data/PageRenderingHistory.cs

@@ -129,7 +129,7 @@ private static void RenderPage(IPage page)
                 return;
             }
 
-            var urlSpace = new UrlSpace(context) { ForceRelativeUrls = true };
+            var urlSpace = new UrlSpace(context) { ForceRelativeUrls = false };
             var url = PageUrls.BuildUrl(page, UrlKind.Public, urlSpace)
                 ?? PageUrls.BuildUrl(page, UrlKind.Renderer, urlSpace);