Merge branch 'zecke/features/osmux-reliability'

Not verified that the audio handling is working. I saw a circuit
set-up of the call though.
tree: ebaa1db540e7e92e9ab9a3a83d0d7cda8173ac4a
  1. debian/
  2. hlrsync/
  3. linux-kernel/
  4. openbsc/
  5. wireshark/
  6. .gitignore