Due to a check that should have been an endian check being an #if 0,
the wrong checksum mask table was being used on LE, which was causing
extreme strangeness in DNS resolution -- *some* hosts would be resolvable,
but most would not.
This fixes DNS resolution.
(I am committing some parts of the LE patchset ahead of time to reduce the
amount of work I have to do while committing the main patchset.)
Sponsored by: Tag1 Consulting, Inc.
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