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Without this option parsing of answer was flaky
as for long records like
_submission._tcp.nine.testrun.org.
dig printed the result with a space rather
than tab as a separator and .split("\t") did not work.
This change makes the `dig` command print the answer
in the form we need so there is no need for complex parsing
other than taking the first line.
`-r` option is added to make sure options are not changed by .digrc
in the root home directory.