ISC's libbind provides the standard resolver library,
for communicating with domain name servers, retrieving network host
entries from /etc/hosts or via DNS, converting CIDR network
addresses, perform Hesiod information lookups, retrieve network
entries from /etc/networks, implement TSIG transaction/request
security of DNS messages, perform name-to-address and
address-to-name translations, utilize /etc/resolv.conf
for resolver configuration
