'-d' became '--d' in 0.2.0 release

[crakerjac]

I had been using the '-d' option to point to a database location that made sense to me. Latest build (0.2.0) changed the '-d' to '--d'.
Cron auto-updated my goiplookup and since '-d' was no longer an option, the script always returned false... essentially locking out everyone... not just specific geo zones.
Propose adding back the '-d' option for 'legacy' support.

[axllent]

Thanks for reporting this @crakerjac - this was complete oversight on my part when migrating to the pflag library! I have fixed this in the 0.2.1 release. So sorry for the issues caused!