Geoip City and ISP Support

Support for GeoIP City and ISP databases.

New Lua functions:
Initialiase GeoIP DBs - initGeoIPCityDB(), initGeoIPISPDB()
Lookups - lookupCity() and lookupISP()

This release still only support the legacy GeoIP database format, i.e. files ending in .dat.
When adding new databases, both the ipv4 and ipv6 DBs must be available or initialisation will fail.

v1.2.1

Support for custom webhooks and custom REST endpoints