Make extending subscriber creation easier

* rename variable controlling subscriber creation
* use enum for subscriber creation policy
* move check for subscriber creation policy into separate static
  function

Related: OS#1658, OS#1647
Change-Id: I3b10a9a764fd3a7bb96717a990e52caae16266da
Reviewed-on: https://gerrit.osmocom.org/42
Tested-by: Jenkins Builder
Reviewed-by: Holger Freyther <holger@freyther.de>
4 files changed
tree: 6fdcc72c6e9bdc2c672f3c7364b51b75f8a8889f
  1. contrib/
  2. debian/
  3. openbsc/
  4. .gitignore