Django is getting rid of their legacy auth-related function-based views

and moving to class-based views. Usage of the legacy views emits a

deprecation warning (if enabled). This change updated our URLs to use

the modern views.
This was discovered while investigating an issue with Reset Password

e-mails, where the text would say "Thank you for using !" instead of

"Thank you for using Review Board!" That happened because the e-mail

context is slim, and doesn't have access to Django settings. We now pass

in the product name using one of the class-based view's attributes for

setting e-mail context.

Tested each auth view, making sure nothing regressed.
Reset my password. Verified that the text was correct in the e-mail.