revert inadvertently committed.

was headed this direction while responding to https://status.python.org/incidents/kwsfwt5q4rg1

Author: ewdurbin

pydotorg/settings/heroku.py

@@ -20,6 +20,18 @@
     }
 }
 
+HAYSTACK_SEARCHBOX_SSL_URL = config(
+    'SEARCHBOX_SSL_URL'
+)
+
+HAYSTACK_CONNECTIONS = {
+    'default': {
+        'ENGINE': 'haystack.backends.elasticsearch5_backend.Elasticsearch5SearchEngine',
+        'URL': HAYSTACK_SEARCHBOX_SSL_URL,
+        'INDEX_NAME': 'haystack-prod',
+    },
+}
+
 SECRET_KEY = config('SECRET_KEY')
 
 ALLOWED_HOSTS = config('ALLOWED_HOSTS', cast=Csv())