fixed broken shared links

commands/references.rb

@@ -34,7 +34,7 @@ module Nanoc::CLI::Commands
     end
 
     def site_link title, link, site
-      "[#{title}]: " + site.url + link
+      "[#{title}]: #{site.shared? ? "" : site.url}#{link}"
     end
     
     def duplicate_links

commands/sites.rb

@@ -58,6 +58,10 @@ module ::Nanoc
       @name == "muflax"
     end
 
+    def shared?
+      @name.nil?
+    end
+
     def blog?
       !main_site? # everything is a blog except for the main site
     end