**Do you want to request a *feature* or report a *bug*?**

Feature

**What is the current behavior?**

While server rendering React DOM and then hydrating with a different structure, React rightly warns that there are inconsistencies. But when I first saw these warnings I was not sure exactly what was going wrong.

Here are a few of the warnings I have been receiving:

```
Warning: Did not find a matching <button> in <div>.

Warning: Did not find a matching <img> in <div>.

Warning: Did not expect server HTML to contain a <div> in <div>.
```

Only on that last error did I catch on that this was a problem with server-rendering and the inconsistencies between that and my client render (intentional at the moment while testing some things in unpure render functions).

**What is the expected behavior?**

Being more explicit that this was a rendering inconsistency between server and client.

**Which versions of React, and which browser / OS are affected by this issue? Did this work in previous versions of React?**

React v16-beta.1
var attributes = domElement.attributes;
      for (var i = 0; i < attributes.length; i++) {
        
        var name = attributes[i].name;
        switch (name) {
          
          
          
          case 'data-reactroot':
            break;
          case 'data-reactid':
            break;
          case 'data-react-checksum':
            break;
          
          
          case 'value':
            break;
          case 'checked':
            break;
          case 'selected':
            break;
          default:
            extraAttributeNames.add(attributes[i].name);
        }
      }
    }
    var updatePayload = null;
    for (var propKey in rawProps) {
      if (!rawProps.hasOwnProperty(propKey)) {