bsc: Drop the BTS instead of exiting the application

When the BTS reboots it might not want to accept our BTS Attr,
do not leave the bsc_msc_ip/bsc_nitb but simply drop the BTS
connection.

Manually cherry-picked from: 54e6c8b3400b376ed36fe84f28f7930d2d9ff24b
1 file changed
tree: df76e04a51444e45b6cb9199d2d2111206ad8c4f
  1. hlrsync/
  2. linux-kernel/
  3. openbsc/
  4. wireshark/
  5. README