uses the .RP macro, a separate cover page is created as page 0 which
is not otherwise output. The bug was hiding by a hack in troffrc
that disables SGR support in grotty(1), which I'm going to remove now.
For POLA reasons, still disable SGR support in grotty(1), by passing
-P-c to groff(1). If we want SGR sequences in these documents, this
can be removed.
MFC after: 1 week