AccountSignupForm accesses database on instantiation

  File "/usr/local/lib/python3.9/dist-packages/aleksis/core/forms.py", line 534, in <module>
    class AccountRegisterForm(SignupForm, ExtensibleForm):
  File "/usr/local/lib/python3.9/dist-packages/aleksis/core/forms.py", line 585, in AccountRegisterForm
    privacy_policy = get_site_preferences()["footer__privacy_url"]

This breaks colelctstatic, et al