socks5 RESOLVE handling of ip address different than c-tor

with c-tor, tor-resolve 0.0.0.0 returns 0.0.0.0 immediately as tor just parse the IP and does not try to resolve a domain name. Doing the same with arti, arti tries and fails to resolve the domain, returning a general SOCKS server failure.

Arti should do as c-tor, try to parse the requested name to an ipv4/ipv6 address, and return it immediately if it can