[GPRS] NS: Start to use rate_ctr_group code from libosmocore

Every NS-VC now has a set of counters for incoming and outgoing
number of packets and bytes.

We also split the VTY part of the gprs_ns.c implementation into gprs_ns_vty.c
to make sure the protocol can actually be used without the VTY code being
present.
8 files changed
tree: 4ff1287a99734d57a63fb64f524fa168ab2d2ee2
  1. hlrsync/
  2. libosmocore/
  3. linux-kernel/
  4. openbsc/
  5. rrlp-ephemeris/
  6. wireshark/