- Henrik Stoerner: found out that C-ARES does not look at the /etc/host.conf

- Henrik Stoerner: found out that C-ARES does not look at the /etc/host.conf
  file to determine the sequence in which to search /etc/hosts and DNS.  So on
  systems where this order is defined by /etc/host.conf instead of a "lookup"
  entry in /etc/resolv.conf, C-ARES will always default to looking in DNS
  first, and /etc/hosts second.

  c-ares now looks at

  1) resolv.conf (for the "lookup" line);
  2) nsswitch.fon (for the "hosts:" line);
  3) host.conf (for the "order" line).

  First match wins.