Nick Kralevich 1781ed7774 add CLOEXEC to various DNS related code
Occasionally file descriptors seem to be leaking across execs
from DNS related calls. Set close-on-execute for the various
sockets / file to prevent file descriptor leakage.

Change-Id: I4724b47bc7236f40c29518a6075598a9bba48b0a
2014-06-29 20:46:17 -07:00
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