This change looks okay, but I'm concerned about migrations. Does this work with ./manage.py evolve?
Remove gratuitous restrictions on bug_tracker URLs
Review Request #520 — Created Aug. 31, 2008 and submitted
Django's URLField is fairly strict in the kinds of URLs it allows. For example, it fails to allow domain-less (internal) hostnames; see http://code.djangoproject.com/ticket/7969. Based on django tickets, it also prevents some other useful real-world URLs. Since the bug tracker URL is controlled by the administrator, and internal sites may face working with legacy system integration, I propose removing the URL validation by switching to CharField. Not covered in this patch is altering django's source to fix url_re in Django's source (url_re in django/forms/fields.py line 523).
None (I modified the database directly, which worked for my internal installation's needs)