On Sun Jun 25 14:30:32 2017, marka wrote:
> I don't see any test cases for this error handling.

Additionally there is a case for continuing to fail in
non-iteractive mode.  We may want to add a interactive
mode flag to facilite testing.  We may also want to add
a "fail on error" flag (c.f. "sh -e")  so that errors in programs
feeding nsupdate are easily detected.