bsc/ussd: Optionally send USSD message on MSC disconnection

Send an USSD message on each MS connection if the connection to
the MSC has been lost.
Add a vty config command 'bsc-msc-loss-txt' in 'config-msc' to set
the notification string and to enable the feature.

Ticket: OW#957
4 files changed
tree: 9fdaa9f2a1b853c265a0a4bed85d9838e11d3b11
  1. debian/
  2. hlrsync/
  3. linux-kernel/
  4. openbsc/
  5. wireshark/
  6. README