* Now that the changes in `forms.py` are removed we need to add `help_text` here. 
* Also django provides `models.URLField` which is a CharField with URL validation. 
* I'm not clear on URL limits of browsers / search engines / etc as I found controversial info on the web about it. Some say that even 2048 can be too large. IMHO it's definitely too large for the type of link we want here. I'd limit this to 1024 chars, although I believe we could go with even less but I want to make sure we support complex bugzilla query URLs. If you know otherwise please advise.

Combining all three the code should look like this
```python
story_link = models.URLField(
        _lazy(u'Link to your contribution story'),
        help_text=_lazy(u'If you have created something public that tells the story of how '
                        u'you came to be a Mozillian, specify that link here.'),
        blank=True, default='', max_length=1024)
```