Changing env var from REDIS_CACHE_URL to REDIS_URL to work better wit…

…h heroku

privaterelay/settings.py

@@ -254,12 +254,12 @@ def _get_initial_middleware():
     )
 }
 
-REDIS_CACHE_URL = config('REDIS_CACHE_URL', '', cast=str)
-if REDIS_CACHE_URL:
+REDIS_URL = config('REDIS_URL', '', cast=str)
+if REDIS_URL:
     CACHES = {
         "default": {
             "BACKEND": "django_redis.cache.RedisCache",
-            "LOCATION": REDIS_CACHE_URL,
+            "LOCATION": REDIS_URL,
             "OPTIONS": {
                 "CLIENT_CLASS": "django_redis.client.DefaultClient",
             }
@@ -268,12 +268,6 @@ def _get_initial_middleware():
     SESSION_ENGINE = 'django.contrib.sessions.backends.cache'
     SESSION_CACHE_ALIAS = 'default'
 
-    # When running on heroku we need to ignore invalid TLS certs
-    # https://devcenter.heroku.com/articles/heroku-redis#connecting-in-django
-    if ON_HEROKU:
-        CACHES['default']['OPTIONS']['CONNECTION_POOL_KWARGS'] = {"ssl_cert_reqs": None}
-
-
 # Password validation
 # https://docs.djangoproject.com/en/2.2/ref/settings/#auth-password-validators