Cancellation of In-Progress Downloads
In the client, a user can delete a message plan which also removes all message plan items, solutions etc. However, if the download of attachments has begun, there needed to be a way to cancel.
The client will handle the notification sent to the server, and the server will remove entries from pullme data.
Whenever a "Dwnld_Cncl" request is received from the client, the server will remove the associated requests from the server.