NXD Show ICP on front page & on footer of every other pages

TODO detect whether request comes from China and only then show ICP (?).

app/helpers/page_layout_helper.rb

@@ -129,4 +129,13 @@ module PageLayoutHelper
 
     css_class.join(' ')
   end
+
+  def should_render_icp?
+    extra_config.has_key?('ICP')
+    # TODO render ICP only for requests from China
+  end
+
+  def render_icp
+    link_to extra_config.ICP, "http://www.miibeian.gov.cn/"
+  end
 end

app/views/layouts/_page.html.haml

@@ -23,3 +23,6 @@
     = link_to "About GitLab", "https://about.gitlab.com/"
     |
     = link_to "About Nexedi", "http://www.nexedi.com/"
+    - if should_render_icp?
+      |
+      = render_icp

app/views/layouts/devise.html.haml

@@ -36,4 +36,5 @@
           = link_to _("Help"), help_path
           = link_to _("About GitLab"), "https://about.gitlab.com/"
           = link_to _("About Nexedi"), "http://www.nexedi.com/"
-      = footer_message
+          - if should_render_icp?
+            = render_icp

config/gitlab.yml.example

@@ -774,6 +774,9 @@ production: &base
     # piwik_url: '_your_piwik_url'
     # piwik_site_id: '_your_piwik_site_id'
 
+    ## Site ICP number
+    # ICP: '_your_site_icp_'
+
   rack_attack:
     git_basic_auth:
       # Rack Attack IP banning enabled