fix azure proxy

lib/normalize_client_ip_middleware.rb

@@ -6,11 +6,18 @@ class NormalizeClientIpMiddleware
   end
 
   def call(env)
-    if env['HTTP_CLIENT_IP'].present? && env['HTTP_X_CLIENT_IP'].present? &&
+    if env['HTTP_CLIENT_IP'].present?
+      if env['HTTP_X_CLIENT_IP'].present? &&
          env['HTTP_CLIENT_IP'].starts_with?("#{env['HTTP_X_CLIENT_IP']}:")
         env['HTTP_CLIENT_IP'] = env['HTTP_X_CLIENT_IP']
       end
 
+      if env['HTTP_X_FORWARDED_FOR'].present? &&
+         env['HTTP_X_FORWARDED_FOR'].sub(/:\d+\z/, '') == env['HTTP_CLIENT_IP']
+        env['HTTP_X_FORWARDED_FOR'] = env['HTTP_CLIENT_IP']
+      end
+    end
+
     @app.call(env)
   end
 end