Merge branch 'daniel/t3212-work'

This implements exipiry of subscribers, requires a schema change. A permanent
attachment (time set to 0) is not supported any more and would require some
more work. This code was used at the 29C3.
tree: 24172b4d605cd2903bf62f26d4f9df8811472d8e
  1. debian/
  2. hlrsync/
  3. linux-kernel/
  4. openbsc/
  5. wireshark/
  6. README