main: add option parsing with db file and default options

Parse commandline options, supporting general Osmocom options as copied from
osmo-nitb (bsc_hack.c): version, logging and daemonize options.

Set the HLR database file from cmdline option, log the filename in db_open().

(VTY config file in next patch.)

Change-Id: I279d517e1310e398b0a2382349e62be8e65364c1
2 files changed