Correctly honour spoofonly in readvdmlabel() to avoid reading the on-disk label when it's not welcome.
Correctly honour spoofonly in readvdmlabel() to avoid reading the on-disk label
when it's not welcome.

orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars