urlpatterns = [
...
url(r'^favicon\.ico$', RedirectView.as_view(url='/static/img/favicon.ico', permanent=True)),
...
]
{% load static %}
<!doctype html>
<html>
<head>
<meta charset="UTF-8">
<title>{{ page_title }}</title>
<link rel="stylesheet" href="{% static "css/main.css" %}">
<link rel="shortcut icon" type="image/png" href="{% static "favicon.ico" %}">
....