e77ef47d36
This partially reverts commit af433832f7520840c22edd1fe1266c1a5cb781ad. Since such bogus disklabels still exist in the wild, we now probe for a disklabel to decide whether to ignore the UFS partition or not; if there is a label then we use the old behaviour, and if there isn't one then we use the new behaviour. Reviewed by: cy, mckusick Differential Revision: https://reviews.freebsd.org/D31068