Make it clearer that Maximum size is the global limit.

(cherry picked from commit a848e575cd37eb3cc421a66fc6b4bbfb26782d8e)

src/NzbDrone.Core/DecisionEngine/Specifications/MaximumSizeSpecification.cs

@@ -41,7 +41,7 @@ namespace NzbDrone.Core.DecisionEngine.Specifications
 
             if (size > maximumSize)
             {
-                var message = $"{size.SizeSuffix()} is too big, maximum size is {maximumSize.SizeSuffix()}";
+                var message = $"{size.SizeSuffix()} is too big, maximum size is {maximumSize.SizeSuffix()} (Settings->Indexers->Maximum Size)";
 
                 _logger.Debug(message);
                 return Decision.Reject(message);