Preserve more metadata frmo 2.11BSDpl195 tape

[bsdimp]

Need to use mtree to extract ownership, permission and date data from 2.11BSDpl195 and 2.10.1BSD tapes. We can then use this to create the new tape. We need to also merge in the dates from the patches, somehow, to arrive at the final data. It would be nice if we can also include this recovered data in the git repo so we can use it to re-create a date-accurate system. Looking at the 'too-new' dated files have found a lot of issues.