[1.6.x] Fixed #18944 -- Documented PasswordResetForm's from_email argument as a backwards incompatible change for 1.3

Thanks DrMeers for the report.

Backport of dab921751d from master

docs/releases/1.3.txt

@@ -650,6 +650,15 @@ Prior to Django 1.3, inactive users were able to request a password reset email
 and reset their password. In Django 1.3 inactive users will receive the same
 message as a nonexistent account.
 
+Password reset view now accepts ``from_email``
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+The :func:`django.contrib.auth.views.password_reset` view now accepts a
+``from_email`` parameter, which is passed to the ``password_reset_form``'s
+``save()`` method as a keyword argument. If you are using this view with a
+custom password reset form, then you will need to ensure your form's ``save()``
+method accepts this keyword argument.
+
 .. _deprecated-features-1.3:
 
 Features deprecated in 1.3