Allow nodeboot to harmlessly take -u
Allow nodeboot to harmlessly take -u

It doesn't actually change behavior, but request for compatibility
is being honored.

whowutwut/confluent,xcat2/confluent,whowutwut/confluent,jjohnson42/confluent,jjohnson42/confluent,xcat2/confluent,whowutwut/confluent,jjohnson42/confluent,xcat2/confluent,xcat2/confluent,jjohnson42/confluent,xcat2/confluent,jjohnson42/confluent,whowutwut/confluent