Backport check_project_feature_available! from EE

app/controllers/projects/application_controller.rb

@@ -53,9 +53,16 @@ class Projects::ApplicationController < ApplicationController
     end
   end
 
+  def check_project_feature_available!(feature)
+    return render_404 unless project.feature_available?(feature, current_user)
+  end
+
   def method_missing(method_sym, *arguments, &block)
-    if method_sym.to_s =~ /\Aauthorize_(.*)!\z/
+    case method_sym.to_s
+    when /\Aauthorize_(.*)!\z/
       authorize_action!($1.to_sym)
+    when /\Acheck_(.*)_available!\z/
+      check_project_feature_available!($1.to_sym)
     else
       super
     end