* Get encryption key size
Date: 2006/04/11
Description: This method is not implemented

* record doesn't exist and not available
Date: 2006/04/11
Description: Review these errors. The usage of "Does not exists"
and "Not available" are confusing.

* code standard for sending msg function
Date: 2006/04/13
Description: use send_reply_and_unref when possible.