Add stat items for the BTS's channel load average and T3122.

In addition to logging the current values of a BTS's channel load
average and T3122 override, maintain stat items for these values.
This allows for plotting these values over time, for instance.

These values show up in the VTY under 'show stats' like this:

base transceiver station:
 Channel load average.:       25 %
 T3122 IMMEDIATE ASSIGNMENT REJECT wait indicator.: 32 s

Port of osmo-bsc commit 4e9d40db2f86bfbd4d9c8bf9e3d9196f5ddf22c6

Change-Id: I766bd51f539dd96236b9c81d661e9d31f5027db4
4 files changed
tree: 8b32fa92fbfd95a963803122415303f58235a5ad
  1. contrib/
  2. debian/
  3. openbsc/
  4. .gitignore
  5. .gitreview
  6. .mailmap