paging: Introduce a GSM_PAGING_BUSY event for a special timeout

Start counting the attempts of each paging request and call
the callback with the PAGING_BUSY type when the paging request
timed out but the subscriber was not paged at all. This can
only happen with a huge paging backlog.
In case the system has so many pending paging
8 files changed
tree: 78b37e09498f90455cfeedbcff3d0d1e63091673
  1. hlrsync/
  2. linux-kernel/
  3. openbsc/
  4. wireshark/