chore(landing_strip): hide signup path unless the instance allows registration. (#3055)

app/helpers/application_helper.rb

@@ -9,6 +9,10 @@ module ApplicationHelper
     !user_signed_in? && !single_user_mode?
   end
 
+  def open_registrations?
+    Setting.open_registrations
+  end
+
   def add_rtl_body_class(other_classes)
     other_classes = "#{other_classes} rtl" if [:ar, :fa, :he].include?(I18n.locale)
     other_classes

app/views/shared/_landing_strip.html.haml

@@ -1,6 +1,6 @@
 .landing-strip
   = t('landing_strip_html',
     name: content_tag(:span, display_name(account), class: :emojify),
-    domain: site_hostname,
-    link_to_root_path: link_to(content_tag(:strong, site_hostname), root_path),
-    sign_up_path: new_user_registration_path)
+    link_to_root_path: link_to(content_tag(:strong, site_hostname), root_path))
+  - if open_registrations?
+    = t('landing_strip_signup_html', sign_up_path: new_user_registration_path)