Use parse_backend_conf it is exists, otherwise fallback on parse_backend_uri
Use parse_backend_conf it is exists, otherwise fallback on parse_backend_uri

8203cef95cc656302cd0e5bbe82c70565d0ac911 imported features that didn't exist
before Django 1.3.  This commit imports parse_backend_conf and
DEFAULT_CACHE_ALIAS and if they don't exist (i.e., we're using Django < 1.3)
use parse_backend_uri instead.

edavis/django-cache-stats