nscd gotcha

[Roland McGrath]

> How hard would it be to make nscd look at the DNS TTL for an RR an honor it?

It would require changing the ABI for nsswitch modules, which is what nscd
uses.  One of these is the nss_dns module, but nscd's work is generic to
whatever flavors you configure in /etc/nsswitch.conf, so it caches results
from files, nis, ldap, whatever.  The interface we have now for these
modules does not have a way to give back extra information with the answer.