- Make sure /etc/hosts gets used before we go to the network.
It seems that under some (all?) circumstances, the res_* functions
are DNS ONLY - ie, they ignore /etc/nsswitch.conf and /etc/hosts.
I can't confirm this - documentation on the resolver is sketchy (no
surprise there).
If res_* can't be made to use /etc/nsswitch.conf and /etc/hosts on
ALL systems, then we have two options:
- Load /etc/nsswitch.conf and /etc/hosts ourself, and search there
before hitting the network.
- Don't do SRV lookups at all if there's no nameserver specified in
/etc/resolv.conf, and use gethostbyname() for the A lookup.
Both these suck.