Merge pull request #1894 from veselov/2.8

* fixed doc URL for keyspace events

redis.conf

@@ -595,7 +595,7 @@ latency-monitor-threshold 0
 ############################# Event notification ##############################
 
 # Redis can notify Pub/Sub clients about events happening in the key space.
-# This feature is documented at http://redis.io/topics/keyspace-events
+# This feature is documented at http://redis.io/topics/notifications
 # 
 # For instance if keyspace events notification is enabled, and a client
 # performs a DEL operation on key "foo" stored in the Database 0, two