* sms: Introduce VTY-configurable minimum SMS validity period
* sms: Make default SMS validity period configurable via VTY
* smpp: Parse and use SMPP-provided validity period
* sms_queue: Make deletion of messages from DB VTY-configurable
* sms_queue: Use local variable rather than 9x pointer de-ref in function
* sms: Give smsc its own VTY config node
Gerrit Code Review