Fix establishing an SSL connection

Adapted from https://github.com/BureauxLocaux/django-redis-cache/commit/18ea61fe8defd8f5631227e0e75a14a5cb0a0c26

See https://github.com/sebleier/django-redis-cache/issues/118

redis_cache/connection.py

-from redis.connection import UnixDomainSocketConnection, Connection
+from redis.connection import UnixDomainSocketConnection, Connection, SSLConnection
 
 
 class CacheConnectionPool(object):
@@ -25,6 +25,7 @@ class CacheConnectionPool(object):
         host='127.0.0.1',
         port=6379,
         db=1,
+        ssl=False,
         password=None,
         parser_class=None,
         unix_socket_path=None,
@@ -42,7 +43,9 @@ class CacheConnectionPool(object):
 
         if pool is None:
             connection_class = (
-                unix_socket_path and UnixDomainSocketConnection or Connection
+                unix_socket_path and UnixDomainSocketConnection
+                or ssl and SSLConnection
+                or Connection
             )
 
             kwargs = {

redis_cache/utils.py

@@ -114,7 +114,7 @@ def parse_connection_kwargs(server, db=None, **kwargs):
                     pass
 
             if url.scheme == 'rediss':
-                url_options['connection_class'] = SSLConnection
+                url_options['ssl'] = True
 
         # last shot at the db value
         url_options['db'] = int(url_options.get('db', db or 0))