REVIEW: removes the automatic detection of the relative_url_root as it is no longer supported

* need to have a single point to set the relative_url

app/controllers/settings_controller.rb

@@ -38,8 +38,7 @@ class SettingsController < ApplicationController
       @options[:user_format] = User::USER_FORMATS.keys.collect {|f| [User.current.name(f), f.to_s] }
       @deliveries = ActionMailer::Base.perform_deliveries
 
-      @guessed_host_and_path = request.host_with_port.dup
-      @guessed_host_and_path << ('/'+ Redmine::Utils.relative_url_root.gsub(%r{^\/}, '')) unless Redmine::Utils.relative_url_root.blank?
+      @guessed_host_and_path = request.host_with_port.dup + Redmine::Utils.relative_url_root.to_s
 
       Redmine::Themes.rescan
     end

lib/redmine/utils.rb

@@ -15,21 +15,8 @@
 module Redmine
   module Utils
     class << self
-      # Returns the relative root url of the application
-      def relative_url_root
-        ActionController::Base.respond_to?('relative_url_root') ?
-          ActionController::Base.relative_url_root.to_s :
-          ActionController::AbstractRequest.relative_url_root.to_s
-      end
 
-      # Sets the relative root url of the application
-      def relative_url_root=(arg)
-        if ActionController::Base.respond_to?('relative_url_root=')
-          ActionController::Base.relative_url_root=arg
-        else
-          ActionController::AbstractRequest.relative_url_root=arg
-        end
-      end
+      attr_accessor :relative_url_root
     end
   end
 end