Furthermore, it seems that if an OPT RR is put on the command line, and
then another within the batch file, any _subsequent_ OPT RRs on later
batch file lines are ignored, and only the previous ones used.

If no OPT RR is put on the command line then individual OPT RRs within
the batch file are processed as expected (until the aforementioned limit
of 100 accumulated RRs is reached).