Update comments about redis config.

library/database/redis

@@ -22,9 +22,9 @@ module: redis
 short_description: Various redis commands, slave and flush
 description:
    - Unified utility to interact with redis instances.
-     'slave'  Sets a redis instance in slave or master mode.
-     'flush' Flushes all the instance or a specified db.
-     'config' Ensures a configuration setting on an instance.
+     'slave' sets a redis instance in slave or master mode.
+     'flush' flushes all the instance or a specified db.
+     'config' (new in 1.6), ensures a configuration setting on an instance.
 version_added: "1.3"
 options:
     command:
@@ -77,11 +77,13 @@ options:
         default: all
         choices: [ "all", "db" ]
     name:
+        version_added: 1.6
         description:
             - A redis config key.
         required: false
         default: null
     value:
+        version_added: 1.6
         description:
             - A redis config value.
         required: false