Robert Greenwalt 78851f10d1 Cache negative DNS results.
Find the TTL for the negative results using the minimum of
the SOA records TTL or the MINIMUM-TTL field (RFC-2308).

bug:5926539
Change-Id: I6d39c9fb558afcb7a4a5bc014d97dab4a85c0d4f
2013-01-09 16:36:33 -08:00
..
2013-01-09 16:36:33 -08:00