LCS: disable Lb interface by default, add vty 'smlc' / 'enable'

To not modify previous SCCP behavior of OsmoBSC, keep the Lb interface disabled
by default. The following configuration enables the Lb interface:

  smlc
   enable

Change-Id: I01314a29a2cad6f325d9f4687a9dedca6b90a3ce
3 files changed