Lua GeoIP callbacks fully support new GeoIP class

Functions VH:GetUserCC(nick), VH:GetUserCN(nick) and VH:GetUserCity(nick, [db]) are now much faster, they read values directly from user class. Added VH:GetIPCity(ip, [db]) among already existing VH:GetIPCC(ip) and GetIPCN(ip) functions. VH:GetUserGeoIP(nick, [db]) and VH:GetHostGeoIP(host, [db]) work in same way, returning GeoIP table.