When in commit db15341d27 I added support
for testing TXT, I used the space character to make it easy to
concatenate the records. Unfortunately, that means it's easy to false-
positive the test by creating one record with a single entry containing
a space instead of two entries.
So use the NULL character instead.
Change-Id: Ia0aac2f09e9245339951ffff13c7d239ea83583d
Reviewed-by: Jeremy Lainé <jeremy.laine@m4x.org>
Reviewed-by: Richard J. Moore <rich@kde.org>