Attempt to prevent errors from subdomain-fu on 2.3.8 when people request/probe using an IP-based URL

gistfile1.diff

diff --git a/lib/core_extensions/action_controller_request.rb b/lib/core_extensions/action_controller_request.rb
index fcd578c..08bdd4a 100644
--- a/lib/core_extensions/action_controller_request.rb
+++ b/lib/core_extensions/action_controller_request.rb
@@ -7,4 +7,11 @@ class ActionController::Request
     end
   end
 
+
+  BASE_CHANGE_DOMAIN = ENV['BASE_URL'].split(':')[0]
+  # We only have one domain, so attempt to fall back to it when someone fails to provide a Host: header or is otherwise lame.
+  def domain_with_default
+    domain_without_default || BASE_CHANGE_DOMAIN
+  end
+  alias_method_chain :domain, :default
 end