Override connection handler's buffer size limit warning

The size of batch buffers is now configurable, so the buffer size warning
limit is adapted to the same value.

src/dhtnode/connection/DhtConnectionHandler.d

@@ -519,6 +519,20 @@ public class DhtConnectionHandler
     }
 
 
+    /***************************************************************************
+
+        Returns:
+            the maximum buffer size that is considered sane for a DHT node
+
+    ***************************************************************************/
+
+    override protected ulong bufferSizeWarnLimit ( )
+    {
+        return (cast(DhtConnectionSetupParams)this.setup)
+            .storage_channels.batch_size;
+    }
+
+
     /***************************************************************************
 
         Command code 'None' handler. Treated the same as an invalid command