Add a changelog_url helper so that pods can report a more correct changelog

app/helpers/application_helper.rb

@@ -11,6 +11,11 @@ module ApplicationHelper
     AppConfig.version.number.present? ? AppConfig.version.number : ""
   end
 
+  def changelog_url
+    url = "https://github.com/diaspora/diaspora/blob/master/Changelog.md"
+    url.sub!('/master/', "/#{AppConfig.git_revision}/") if AppConfig.git_available?
+  end
+
   def how_long_ago(obj)
     timeago(obj.created_at)
   end

app/views/shared/_links.haml

@@ -1,6 +1,6 @@
 %li= link_to '@joindiaspora', "http://twitter.com/joindiaspora"
 %li= link_to 'github', "https://github.com/diaspora/diaspora"
 %li= link_to t('layouts.header.blog'), "http://blog.diasporafoundation.org/"
-%li= link_to t('layouts.application.whats_new'), 'https://github.com/diaspora/diaspora/blob/master/Changelog.md'
+%li= link_to t('layouts.application.whats_new'), changelog_url
 %li= link_to(t('layouts.header.code') + " " + pod_version, "#{root_path.chomp('/')}/source.tar.gz", {:title => t('layouts.application.source_package')}) unless request.url.match(/joindiaspora.com/)
 %li= link_to(t('layouts.application.toggle'), toggle_mobile_path)